Parsec-Scale Jet Properties of Fermi-detected AGN
|
|
- Beverley Harrington
- 5 years ago
- Views:
Transcription
1 Parsec-Scale Jet Properties of Fermi-detected AGN Matthew Lister (Purdue) for the MOJAVE Team Montage by M. Kadler et al.
2 MOJAVE Collaboration M. Lister (P.I.), N. Cooper, B. Hogan, T. Hovatta S. Kuchibhotla (Purdue) T. Arshakian, C.S. Chang, L. Fuhrmann, A. Lobanov, A. Pushkarev, T. Savolainen, J. A. Zensus (Max Planck Inst. for Radioastronomy) FmJ 2010 M. and H. Aller (Michigan) M. Cohen (Caltech) D. Homan (Denison) M. Kadler (U. Erlangen-Bamberg) K. Kellermann (NRAO) Y. Kovalev (ASC Lebedev) E. Ros (U. Valencia) N. Gehrels, J. McEnery, R. Sambruna, J. Tueller (GSFC) We thank the LAT team and Moritz Böck for providing us with LAT data/analysis. The MOJAVE Program is supported under NASA Fermi Grant NNX08AV67G and NSF grant AST. Fermi Monitoring Of Jets in Active Galaxies with VLBA Experiments Very Long Baseline Array
3 Fermi-Jansky Connection Remarkable synergy in extragalactic sky between Ɣ- ray and high freq. radio regimes Three-month (LBAS) Fermi catalog: 54% identified with VLBI radio sources (Kovalev 2009, ApJL 707) 1FGL (11-month) Fermi catalog majority of sources outside galactic plane have flat-spectrum blazar associations (Abdo et al ApJS 188) 43% of southern 1FGL are associated with AT20 GHz catalog. Fermi detection rate is ~100% for brightest AT20 GHz sources (Mahony et al. 2010, Ghirlanda et al. 2010) AGN gamma-ray emission is directly connected with beamed relativistic jets
4 Ɣ-ray vs. VLBA radio core flux VLBA measurement 2.5 ± 0.2 months after 1FGL meas. MOJAVE sample: Pushkarev et al. arxiv
5 Ɣ-ray vs. high frequency radio flux AT 20 GHz sample: Mahony et al. arxiv
6 What makes an AGN γ ray bright? High current activity state Kovalev et al. ApJ 696, L17 High-peaked spectral energy distribution Abdo et al. 2010, ApJ 716,30 Preferred jet viewing angle Pushkarev et al., 2010 A&A 507, L33; Savolainen et al A&A 512, A24; Ojha et al. arxiv High jet Lorentz factor Lister et al. ApJ 696, L22; Savolainen et al A&A 512, A24
7 MOJAVE-1 Sample Selected on 15 GHz VLBA radio flux density multi-year ( ) flux threshold criterion frequent VLBA epochs back to 1994 for most sources Complete in sky region above dec -20 obscuration not an issue at high radio frequency 135 sources, redshifts are 95% complete sample dominated by flat-spectrum blazars 61% have a LAT 1FGL association Radio-selected Lister et al., 2009, AJ, 137, 3718 Lister & Homan 2004, AJ 130, 1389
8 1FM Sample FmJ 2010 Brightest 124 AGN in 1FGL (median energy flux): sky region: b > 10, dec > -30 brightest 1FGL sources not as affected by source confusion, background subtraction, LAT PSF and energy response Rejected 25 radio weak AGN: less than 0.2 Jy compact radio flux density at 15 GHz (from Fermi launch through ) Final 1FM sample has 99 AGN 43 of these are in MOJAVE-1 (i.e., radio-bright---ɣ-bright) Ɣ-ray-selected (Lister et al., in prep.)
9 What makes an AGN γ ray bright? Complex combination of: High current activity state Kovalev et al. ApJ 696, L17 High-peaked spectral energy distribution Abdo et al. 2010, ApJ 716,30 Preferred jet viewing angle Pushkarev et al., 2010 A&A 507, L33; Savolainen et al A&A 512, A24; Ojha et al. arxiv High jet Lorentz factor Lister et al. ApJ 696, L22; Savolainen et al A&A 512, A24
10 Blue = Radio-selected blazars (MOJAVE-1) Red = Gamma-ray selected blazars (1FM) Decl. > - 30 b > 10 A B ( 25 1FGLs in this region ) 1FM Ɣ-ray limit (Incomplete in this region) D MOJAVE-1 completeness limit ( ) C
11 Outer = 1FM + MOJAVE-1 (all sources) Low radio activity state High radio activity state FmJ 2010 Comparison of 15 GHz VLBA median flux densities in pre- and post LAT era: brightest 1FGL sources are in high radio activity states similar result found for 3-month list by Kovalev et al. 2009, ApJL
12 Jet Activity States At any given time, only the energized portion of a broader jet is visible Stacked image: FmJ 2010 Activity states of AGN jets evolve over time long quiescent periods with no blob ejections new blobs ejected at new position angles only 30% of the 3 month LAT AGN were detected by EGRET Image 13yrs later: from June March Lister et al., 2009, AJ, 137, 3718
13 Jet Activity States Are changes in pc-radio jet emission and morphology reflected in the gamma-ray YES results of activity? Boston U. group on 3C454.3 (Jorstad et al. 2010), (Marscher et al. 2010), & this meeting. Jorstad et al., these proceedings Does the jet beaming factor change with activity state? SED modeling of Abdo et al. ApJ 716, 835 suggests higher Doppler factors in high states
14 What makes an AGN γ ray bright? Complex combination of: High current activity state Kovalev et al. ApJ 696, L17 High-peaked spectral energy distribution Abdo et al. 2010, ApJ 716,30 Preferred jet viewing angle Pushkarev et al., 2010 A&A 507, L33; Savolainen et al A&A 512, A24; Ojha et al. arxiv High jet Lorentz factor Lister et al. ApJ 696, L22; Savolainen et al A&A 512, A24
15 Spectral Energy Distributions (SEDs) High fraction (42%) of 1FGL catalog are BL Lacs 86% of MOJAVE-1 BL Lacs are LAT-associated but only 57% of MOJAVE-1 quasars Sensitivity of LAT favors high-peaked SED objects (Abdo et al. 2010, ApJS 188, 405) Moving SED peak to higher energy means lower un-beamed radio-to-ɣ-ray flux ratio
16 Mrk 421 FmJ 2010
17 Blue = Radio-selected blazars (MOJAVE-1) Red = Gamma-ray selected blazars (1FM) No HBL in MOJAVE-1 A B (25 AGN in this region) 1FM Ɣ-ray limit (Incomplete in this region) D MOJAVE-1 completeness limit ( ) C
18 Soft Hard High-SED peaked Blue: 1FM-in-MOJAVE-1 (radio selected) Red: 1FM-non-MOJAVE-1 (Ɣ-ray selected) Harder energy index means IC peak lies at higher energy (Abdo et al. 2010, ApJ 716,30)
19 Why are these bright lowspectral-peaked LAT AGN radio weak? Blue: 1FM-in-MOJAVE-1 (radio selected) Red: 1FM-non-MOJAVE-1 (Ɣ-ray selected)
20 What makes an AGN γ ray bright? Complex combination of: High current activity state Kovalev et al. ApJ 696, L17 High-peaked spectral energy distribution Abdo et al. 2010, ApJ 716,30 Preferred jet viewing angle Pushkarev et al., 2010 A&A 507, L33; Savolainen et al A&A 512, A24; Ojha et al. arxiv High jet Lorentz factor Lister et al. ApJ 696, L22; Savolainen et al A&A 512, A24
21 Blue = Radio-selected blazars (MOJAVE-1) Red = Gamma-ray selected blazars (1FM) max viewing angle = δ -1 A B (25 AGN in this region) 1FM Ɣ-ray limit (Incomplete in this region) D C
22 Apparent Jet Opening Angles 3month MOJAVE-1-LAT generally have broader apparent opening angles than non-lat similar result found for TANAMI (Ojha et al. 2010, arxiv ) MOJAVE/LAT/TeV HBL Overall intrinsic opening angle distributions are similar The bright LAT blazar jets are typically viewed closer to the line of sight Pushkarev et al., 2009 A&A, 507, L33
23 MOJAVE-1: AGN in 3 month LBAS list oriented closer to line of sight than non-lbas FmJ 2010 In moving jet frame, a deficit of LBAS jets viewed end-on possible anisotropy in restframe gamma-ray emission pattern off-axis mini-jet emission model of Giannios et al. 2010, MNRAS 402, 1649 selection effects currently being studied for 1FM sample Savolainen et al., 2010 A&A, 512, A24
24 Doppler boosting Unbeamed Ɣ-ray flux Unbeamed radio flux
25 Doppler boosting Beamed Ɣ-ray flux Equal boosting in both regimes preserves fluxflux correlation Beamed radio flux
26 Doppler boosting Beamed Ɣ-ray flux Unequal boosting destroys linear correlation: produces an upper envelope Beamed radio flux
27 Many emission models (nonsteady jet: Lyutikov & Lister 2010; ECS: Dermer 1995; ) predict higher boosting in Ɣ-rays than radio Highest-boosted AGNs should lie on the top edge of the flux-flux envelopenon-lat Lister 2007, 1 st GLAST Symposium - Monte Carlo radio flux-limited AGN sample - low intrinsic gamma-ray radio lum. scatter - Ɣ-rays boosted more than radio
28 QSOs in region A should have higher Doppler factors and lower un-beamed radio powers than region C. A B (25 AGN in this region) 1FM Ɣ-ray limit (Incomplete in this region) D C
29 Apparent Jet Speeds LAT has detected all of the fastest known jets Г = 40 Г = 20
30 Shaded: QSO Unshaded = BL Lacs Savolainen et al., A&A 512, A24 Doppler Factors MOJAVE-1 LBAS jets have significantly higher Doppler factors than MOJAVE-1 non-lbas. Variability Doppler factor Hovatta, this meeting Doppler factor increases with Ɣ-ray flux in radioselected MOJAVE-1 sample Variability Doppler Factor LBAS = LAT 3 month AGN list
31 Summary 1. Several factors determine whether an AGN is γ-ray loud: more likely to see Ɣ-rays while pc-scale jet is in active radio state high-energy peaked-bl Lacs are more prevalent at fainter Ɣ-ray levels the primary factor is Doppler boosting of pc-scale jet emission FmJ Doppler boosting model predicts an envelope (not a linear correlation) in radio- γ-ray flux-flux plot time lags and variability pose strong challenges for analysis 3. The radio-weak/ɣ-ray bright LSP quasars should have large Doppler factors according to beaming statistics should have much lower intrinsic radio powers than radio-bright/ɣ-weak essential to obtain information via VLBA proper motion and EVLA studies
32
33 What radio-ɣ-ray ray time delay gives the best flux-flux correlation? VLBA measurement 2.5 ± 0.2 months after 1FGL meas. Radio emission lags Ɣ-rays by 1-8 months in our frame (~1 month in host galaxy frame) Pushkarev et al. 2010, arxiv
34 Blue = Radio-selected blazars (MOJAVE-1) Red = Gamma-ray selected blazars (1FM) Decl. > - 30 b > 10 A B (25 AGN in this region) 1FM Ɣ-ray limit (Incomplete in this region) D MOJAVE-1 completeness limit ( ) C
Physical Properties of Jets in AGN. Dan Homan Denison University
Physical Properties of Jets in AGN Dan Homan Denison University Probes of Physical Properties (Part 1) Long Time Baseline Kinematics Distribution of Apparent Speeds in Blazar Population Lorentz Factor/Viewing
More informationKinematics of AGN jets
Journal of Physics: Conference Series Kinematics of AGN jets To cite this article: Eduardo Ros 2008 J. Phys.: Conf. Ser. 131 012061 View the article online for updates and enhancements. This content was
More informationLarge AGN Surveys With VLBI
Large AGN Surveys With VLBI Prof. Matthew Lister, Purdue University MOJAVE EVN VLBA LBA Outline Science motivations and applications for VLBI Large VLBI Surveys from Earth and Space: past and present Investigating
More informationThe Broadband Emission Properties of AGN Jets
The Broadband Emission Properties of AGN Jets Chang, Chin-Shin 1,2,3 Max-Planck-Institut für Radioastronomie 1 Member of International Max Planck Research School of Astronomy and Astrophysics 2 Member
More informationExtending and Exploring the 2cm Survey Sample. Eduardo Ros (MPIfR) and the 2cm Survey Team 7th EVN Symposium Toledo (not in Ohio) 2004/10/12
Extending and Exploring the 2cm Survey Sample Eduardo Ros (MPIfR) and the 2cm Survey Team 7th EVN Symposium Toledo (not in Ohio) 2004/10/12 The 2cm Survey Collaboration Team Members NRAO: Ken I. Kellermann,
More informationThe extreme ends of the spectrum: the radio/gamma connection
The extreme ends of the spectrum: the radio/gamma connection Monica Orienti INAF IRA Bologna Astronomy Department, Bologna University This research has made used of data from the MOJAVE database that is
More informationVLBI and γ-ray studies of TANAMI radio galaxies. Roberto Angioni, MPIfR Bonn EVN symposium, September 2016 St. Petersburg, Russia
VLBI and γ-ray studies of TANAMI radio galaxies Roberto Angioni, MPIfR Bonn EVN symposium, 20-23 September 2016 St. Petersburg, Russia 11/10/2016 R. Angioni - TANAMI radio galaxies 2 Collaborators Eduardo
More informationarxiv: v2 [astro-ph.co] 19 Jan 2010
Astronomy & Astrophysics manuscript no. savolainen v4 c ESO 2018 November 5, 2018 Relativistic beaming and gamma-ray brightness of blazars T. Savolainen 1, D. C. Homan 2, T. Hovatta 3,4, M. Kadler 5,6,7,
More informationarxiv: v1 [astro-ph.he] 24 Jan 2013
arxiv:1301.5751v1 [astro-ph.he] 24 Jan 2013 1, Tuomas Savolainen 1, Alexander B. Pushkarev 2,3,1, Yuri Y. Kovalev 4,1, Matthew L. Lister 5 1 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121
More informationThe radio/gamma-ray connection in Active Galactic Nuclei in the Fermi era
The radio/gamma-ray connection in Active Galactic Nuclei in the Fermi era M. Giroletti INAF Istituto di Radioastronomia and V. Pavlidou, A. Reimer on behalf of the Fermi-LAT collaboration Roma, X Congresso
More informationBlazar science with mm-vlbi. Marcello Giroletti, Monica Orienti, Filippo D Ammando on behalf of the Fermi-LAT collaboration
Blazar science with mm-vlbi Marcello Giroletti, Monica Orienti, Filippo D Ammando on behalf of the Fermi-LAT collaboration Outline Why are blazars interesting? mm-vlbi & blazar sampler 7mm, 3mm, 1.3mm
More informationRadio Loud Black Holes. An observational perspective
Radio Loud Black Holes An observational perspective Tiziana Venturi INAF, Istituto di Radioastronomia, Bologna Overview of the first lesson 1) Synchrotron emission and radio spectra of AGN 2) Classification
More informationInvestigating the jet structure and its link with the location of the high-energy emitting region in radio-loud AGN
Investigating the jet structure and its link with the location of the high-energy emitting region in radio-loud AGN Filippo D Ammando (INAF-IRA and DIFA Bologna) Monica Orienti (INAF-IRA) Marcello Giroletti
More informationarxiv: v1 [astro-ph.he] 20 Sep 2016
galaxies Article Radiative Transfer Modeling of Radio-band Linear Polarization Observations as a Probe of the Physical Conditions in the Jets of γ-ray Flaring Blazars Margo F. Aller 1, Philip A. Hughes
More informationGamma-Rays from Radio Galaxies: Fermi-LAT
Gamma-Rays from Radio Galaxies: Fermi-LAT PAOLA GRANDI INAF/IASF BOLOGNA, ITALY on behalf of the FERMI LAT Collaboration Many thanks to : C. Dermer. G. Ghisellini, L. Maraschi, G. Migliori, E. Torresi,
More informationMultiwavelength observations of the blazar BL Lacertae: a new fast TeV gamma-ray flare
Multiwavelength observations of the blazar BL Lacertae: a new fast TeV gamma-ray flare Qi Feng1 for the VERITAS Collaboration, S.G. JORSTAD, A.P. MARSCHER, M.L. Lister,Y.Y. Kovalev, A.B. Pushkarev, T.
More informationVSOP-2 PLS: ν>8 GHz Yuri Kovalev Humboldt fellow, MPIfR, Bonn; Astro Space Center, Lebedev Physical Institute, Moscow
VSOP-2 PLS: ν>8 GHz Yuri Kovalev Humboldt fellow, MPIfR, Bonn; Astro Space Center, Lebedev Physical Institute, Moscow 14 May 2008 VSOP-2 workshop, Bonn Outline What are the main goals of the VSOP-2 PLS?
More informationINTRINSIC BRIGHTNESS TEMPERATURES OF COMPACT RADIO JETS
Journal of the Korean Astronomical Society http://dx.doi.org/10.5303/jkas.2014.47.6.303 47: 303 309, 2014 December pissn: 1225-4614 eissn: 2288-890X c 2014. The Korean Astronomical Society. All rights
More informationarxiv: v1 [astro-ph] 9 Mar 2008
Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technology ASP Conference Series, Vol. XXX, 2008 Y.Hagiwara, E.Fomalont, M.Tsuboi, and Y.Murata Kinematics of AGN and Quasar Jets arxiv:0803.1301v1
More informationCentral parsec(s) of the quasar
Central parsec(s) of the quasar 0850+581 Yuri Kovalev MPIfR, Bonn ASC Lebedev, Moscow In collaboration with: Andrei Lobanov, Alexander Pushkarev (MPIfR, Bonn) 5 June, 2008 Arecibo Observatory Library Colloquium
More informationNot only typical flaring blazars in the Fermi gamma-ray sky. The strange cases of SBS and PKS
Not only typical flaring blazars in the Fermi gamma-ray sky. The strange cases of SBS 0846+513 and PKS 0521-36 Filippo D Ammando (University of Perugia and INFN) and M. Orienti (Univ. of Bologna and INAF-IRA)
More informationFrom EGRET to Fermi: mm-radio data and the origin of gamma-ray emission
From EGRET to Fermi: mm-radio data and the origin of gamma-ray emission FmJ 2010 Esko Valtaoja Merja Tornikoski, Jonathan León-Tavares, Elina Nieppola, Anne Lähteenmäki, Joni Tammi, Talvikki Hovatta Metsähovi-Tuorla
More informationThe third Fermi LAT AGN catalogue and beyond
The third Fermi LAT AGN catalogue and beyond Filippo D Ammando (DIFA and INAF-IRA Bologna) on behalf of the Fermi LAT Collaboration dammando@ira.inaf.it 1 Different classes of AGN Quasars Radio-quiet or
More informationPoS(IX EVN Symposium)003
The 15 43-GHz Parsec-scale Circular Polarization of AGN Department of Physics, University College Cork, Republic of Ireland E-mail: gabuzda@phys.ucc.ie Vasilii M. Vitrishchak Sternberg Astronomical Institute,
More informationPoS(IX EVN Symposium)007
: VLBA study from 1.4 to 15 GHz Astro Space Center of Lebedev Physical Institute, Profsoyuznaya 84/32, 117997 Moscow, Russia E-mail: ykovalev@mpifr.de Alexander B. Pushkarev Pulkovo Observatory, Pulkovskoe
More informationThe Extragalactic Gamma-Ray View of AGILE and Fermi
INAF, Osservatorio Astronomico di Capodimonte 22 February 2012 The Extragalactic Gamma-Ray View of AGILE and Fermi Elena Pian INAF, Trieste Astronomical Observatory & Scuola Normale Superiore di Pisa UNIFIED
More informationNon-Blazar Gamma-ray Active Galactic Nuclei seen by Fermi-LAT. C.C. Teddy Cheung Naval Research Lab/NRC on behalf of the Fermi-LAT Collaboration
Non-Blazar Gamma-ray Active Galactic Nuclei seen by Fermi-LAT C.C. Teddy Cheung Naval Research Lab/NRC on behalf of the Fermi-LAT Collaboration 1 st LAT AGN Catalog (1LAC) Summary FmJ 2010 Entire 1LAC:
More informationVLBI observations of AGNs
VLBI observations of AGNs Gabriele Giovannini Dipartimento di Astronomia, Universita di Bologna Istituto di Radioastronomia - INAF OUTLINE Single sources: Mkn 501 1144+35 Sample: nearby BL-Lacs nearby
More informationPoS(Extremesky 2011)055
Aalto University Metsähovi Radio Observatory, P.O.Box 13000, FI-00076 Aalto, FINLAND E-mail: joni.tammi@iki.fi I discuss the role of radio observations and modelling of the low-frequency emission in active
More informationGamma-ray emitting narrow-line Seyfert 1 galaxies and their place in the AGN zoo
Gamma-ray emitting narrow-line Seyfert 1 galaxies and their place in the AGN zoo Filippo D Ammando (DIFA and INAF-IRA Bologna) Monica Orienti, Justin Finke, Marcello Giroletti, Josefin Larsson on behalf
More informationMOJAVE: XIII. Parsec-Scale AGN Jet Kinematics Analysis Based on 19 years of VLBA Observations at 15 GHz
MOJAVE: XIII. Parsec-Scale AGN Jet Kinematics Analysis Based on 19 years of VLBA Observations at 15 GHz M. L. Lister 1, M. F. Aller 2, H. D. Aller 2, D. C. Homan 3, K. I. Kellermann 4, Y. Y. Kovalev 5,6,
More informationRadio and gamma-ray emission in Faint BL Lacs
AGN X ROMA, 10-13/09/2012 Radio and gamma-ray emission in Faint BL Lacs E. Liuzzo, B. Boccardi, M. Giroletti, G. Giovannini, F. Massaro, M. Orienti, S. Tamburri, C. Casadio 3EG Catalog γ sky EGRET (3EG,
More informationMOJAVE: Monitoring of jets in active galactic nuclei with VLBA experiments. I. First-epoch 15 GHz linear polarization images
Physics Physics Research Publications Purdue University Year 2005 MOJAVE: Monitoring of jets in active galactic nuclei with VLBA experiments. I. First-epoch 15 GHz linear polarization images M. L. Lister
More informationBottom-up modelling of gamma-ray blazars
Journal of Physics: Conference Series Bottom-up modelling of gamma-ray blazars To cite this article: Joni Tammi 2012 J. Phys.: Conf. Ser. 355 012014 View the article online for updates and enhancements.
More informationFlaring Active Galactic Nuclei: the view from Fermi-LAT
Flaring Active Galactic Nuclei: the view from Fermi-LAT INAF-IASF IASF Palermo On behalf of the Fermi-LAT Collaboration and many multi-wavelength collaborators SciNeGHE 2010 1 The EGRET Era AGN dominate
More informationDoppler boosting as the generator of the blazar sequence
Doppler boosting as the generator of the blazar sequence, 1 Esko Valtaoja, 2,3 Merja Tornikoski, 1 Talvikki Hovatta 1 and Mikko Kotiranta 1 1 Metsähovi Radio Observatory Metsähovintie 114, 02540 Kylmälä,
More informationLinear Polarization Properties of Parsec-Scale AGN Jets. arxiv: v1 [astro-ph.he] 8 Dec 2017
galaxies Article Linear Polarization Properties of Parsec-Scale AGN Jets Alexander B. Pushkarev 1,2, *, Yuri Y. Kovalev 2,3,4, Matthew L. Lister 5, Tuomas Savolainen 6,7,4, Margo F. Aller 8, Hugh D. Aller
More informationDepartment of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907, USA;
galaxies Article AGN Jet Kinematics on Parsec-Scales: The MOJAVE Program Matthew Lister and the MOJAVE Collaboration Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West
More informationCorrelation between γ -ray and radio emissions in Fermi blazars
Publ. Astron. Soc. Japan (2014) 66 (6), 117 (1 11) doi: 10.1093/pasj/psu111 Advance Access Publication Date: 2014 December 11 117-1 Correlation between γ -ray and radio emissions in Fermi blazars De-Xiang
More informationMisaligned AGN with Fermi-Lat:
Misaligned AGN with Fermi-Lat: a different perspective on relativistic jets PAOLA GRANDI INAF/IASF BOLOGNA, ITALY on behalf of the FERMI LAT Collaboration Many thanks to : Torresi E., Migliori G., P. Malaguti,
More informationInvestigation of Radio Structures of High-z QSOs by VLBI Observation
Investigation of Radio Structures of High-z QSOs by VLBI Observation Challenges of 512 Frey et al.: High resolution radio imaging parsec-scale jet component speeds (Fig. 4). More radio luminous sources
More informationarxiv: v1 [astro-ph.he] 2 Jul 2010
Fermi meets Jansky AGN in Radio and Gamma-Rays Savolainen, T., Ros, E., Porcas, R.W., & Zensus, J.A. (eds.) June 21 23, 2010, Bonn, Germany Recent multi-wavelength campaigns in the Fermi-GST era Lars Fuhrmann
More informationThe ALMA contribution to the
The ALMA contribution to the study of the blazar jets M. Orienti (Bologna University, INAF-IRA) Outline The extragalactic γ-ray sky and relativistic jets The Atacama Large Millimeter Array Relativistic
More informationGamma-ray variability of radio-loud narrow-line Seyfert 1 galaxies
Gamma-ray variability of radio-loud narrow-line Seyfert 1 galaxies Università di Milano - Bicocca, Dip. di Fisica G. Occhialini, Piazza della Scienza 3, I-20126 Milano, Italy E-mail: giorgio.calderone@mib.infn.it
More informationarxiv: v1 [astro-ph] 23 Aug 2007
Astrophysics and Space Science DOI 10.1007/sXXXXX-XXX-XXXX-X Doppler Boosting, Superluminal Motion, and the Kinematics of AGN Jets K. I. Kellermann Y. Y. Kovalev M. L. Lister D. C. Homan M. Kadler M. H.
More informationThe Core of a Blazar Jet
Extragalactic Jets: Theory and Observation from Radio to Gamma Ray ASP Conference Series, Vol. 386, c 2008 T. A. Rector and D. S. De Young, eds. The Core of a Blazar Jet Alan P. Marscher Institute for
More informationM87 in context: the radio gamma-ray connection in misaligned AGNs
M87 in context: the radio gamma-ray connection in misaligned AGNs M. Giroletti and F. D'Ammando on behalf of the Fermi-LAT collaboration, and C. Casadio, P. Grandi, K. Hada M87 Workshop: Towards the 100th
More informationHigh-resolution polarization imaging of the Fermi blazar 3C 279
High-resolution polarization imaging of the Fermi blazar 3C 279 1 on behalf of the Fermi-LAT collaboration NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA E-mail: bindu.rani@nasa.gov S. G.
More informationThe TANAMI Program. 1. Introduction
Fermi meets Jansky - AGN in Radio and Gamma-Rays Savolainen, T., Ros, E., Porcas, R. \V., & Zensus, J.A. (cds.) June 21-23, 20, Bonn, Germa,ny The TANAMI Program Roopesh Ojha'*, Matthias Kadler 2,3,.,
More informationRELATIVISTIC BEAMING AND THE INTRINSIC PROPERTIES OF EXTRAGALACTIC RADIO JETS
The Astrophysical Journal, 658:232 244, 2007 March 20 # 2007. The American Astronomical Society. All rights reserved. Printed in U.S.A. RELATIVISTIC BEAMING AND THE INTRINSIC PROPERTIES OF EXTRAGALACTIC
More informationPolarization Studies of Extragalactic Relativistic Jets from Supermassive Black Holes. Iván Agudo
Polarization Studies of Extragalactic Relativistic Jets from Supermassive Black Holes Iván Agudo What is an active galactic nuclei (AGN)? Compact regions at the centre of galaxies with much higher than
More informationMulti-frequency study of the TeV blazar Markarian 421 with VLBA observations taken during 2011
Multi-frequency study of the TeV blazar Markarian 421 with VLBA observations taken during 2011 Presented by: Rocco Lico M.Giroletti, M.Orienti, G.Giovannini, Y.Y.Kovalev, A.Marscher, S.Jorstad, T.P. Krichbaum,
More informationActivity cycles of blazars and quasars from the VLBI observations
Activity cycles of blazars and quasars from the VLBI observations Nadia Kudryavtseva, Silke Britzen, Thomas Krichbaum, Arno Witzel, Eduardo Ros, Anton Zensus, Denise Gabuzda, Svetlana Jorstad, Margo Aller,
More informationPoS(11th EVN Symposium)109
RadioAstron Early Science Program Space-VLBI AGN survey: strategy and first results Astro Space Center, Lebedev Physical Inst. RAS, Profsoyuznaya 84/32, 117997 Moscow, Russia Sternberg Astronomical Institute,
More informationPoS(11th EVN Symposium)024
Multi-frequency study of the TeV blazar Markarian 421 with VLBA observations taken during 2011,1,2, M.Giroletti 1, M.Orienti 1,2, G.Giovannini 1,2, W.Cotton 3, P.G.Edwards 4, L.Fuhrmann 5, Y.Y.Kovalev
More informationTrabajo de Grado. Superluminal motion in relativistic jets. SEPTIEMBRE de Alumno/a: Enrique Sanchis Melchor. Tutor : Eduardo Ros Ibarra
GRADO EN FÍSICA Trabajo de Grado Superluminal motion in relativistic jets SEPTIEMBRE de 2012 Alumno/a: Tutor : Eduardo Ros Ibarra Superluminal motion in relativistic jets Facultad de Física,, Spain E-mail:
More informationThe brightest gamma-ray flares of blazars
MNRAS 430, 1324 1333 (2013) doi:10.1093/mnras/sts711 The brightest gamma-ray flares of blazars Krzysztof Nalewajko University of Colorado, UCB 440, Boulder, CO 80309, USA Accepted 2012 December 23. Received
More informationarxiv: v1 [astro-ph.co] 27 Sep 2011
Astronomy & Astrophysics manuscript no. nieppola c ESO 2018 July 17, 2018 Correlation between Fermi/LAT gamma-ray and 37 GHz radio properties of northern AGN averaged over 11 months E. Nieppola 1,2, M.
More informationThe First Full-Polarimetric 3.5 & 1.3mm Monitoring Program of Bright Gamma-Ray Blazars Iván Agudo
The First Full-Polarimetric 3.5 & 1.3mm Monitoring Program of Bright Gamma-Ray Blazars Iván Agudo Instituto de Astrofísica de Andalucía Granada (Spain) Clemens Thum José L. Gómez Sol Molina Carolina Casadio
More informationRadio sources. P. Charlot Laboratoire d Astrophysique de Bordeaux
Radio sources Laboratoire d Astrophysique de Bordeaux Outline Introduction Continuum and spectral line emission processes The radio sky: galactic and extragalactic History of radioastronomy The first 50
More informationActive galaxies. Some History Classification scheme Building blocks Some important results
Active galaxies Some History Classification scheme Building blocks Some important results p. 1 Litirature: Peter Schneider, Extragalactic astronomy and cosmology: an introduction p. 175-176, 5.1.1, 5.1.2,
More informationSources of GeV Photons and the Fermi Results
Sources of GeV Photons and the Fermi Results 1. GeV instrumentation and the GeV sky with the Fermi Gamma-ray Space Telescope 2. First Fermi Catalog of Gamma Ray Sources and the Fermi Pulsar Catalog 3.
More informationThe connection between millimeter and gamma-ray emission in AGNs
The connection between millimeter and gamma-ray emission in AGNs Marcello Giroletti INAF Istituto di Radioastronomia Secondo Workshop sull'astronomia millimetrica e submillimetrica in Italia Bologna, 2-3
More informationGlobal evlbi observations of the first gamma-ray RL NLS1
Global evlbi observations of the first gamma-ray RL NLS1 Marcello Giroletti (INAF/IRA), Akihiro Doi (ISAS/JAXA) and Z. Paragi, H. Bignall, L. Foschini, K. Gabanyi, C. Reynolds, and many others Outline
More informationStructural Variability of 3C 111 on Parsec Scales
Structural Variability of 3C 111 on Parsec Scales C.Grossberger,M.Kadler,J.Wilms,C.Müller,T.Beuchert,E.Ros,R.Ojha,M.Aller, H. Aller, E. Angelakis, L. Fuhrmann, I. Nestoras, R. Schmidt, J. A. Zensus, T.
More informationarxiv: v1 [astro-ph] 20 Aug 2008
arxiv:0808.2733v1 [astro-ph] 20 Aug 2008, 1 Merja Tornikoski, 1 Harry J. Lehto, 2,3 Elina Nieppola, 1 Esko Valtaoja, 2,3 Markku Lainela, 2 Ilona Torniainen, 1 Anne Lähteenmäki 1 Margo F. Aller 4 and Hugh
More informationBlazars as the Astrophysical Counterparts of the IceCube Neutrinos
Blazars as the Astrophysical Counterparts of the IceCube Neutrinos Maria Petropoulou Department of Physics & Astronomy, Purdue University, West Lafayette, USA Einstein Fellows Symposium Harvard-Smithsonian
More informationarxiv: v1 [astro-ph] 2 Aug 2007
Extragalactic Jets: Theory and Observation from Radio to Gamma Ray ASP Conference Series, Vol. **VOLUME**, **YEAR OF PUBLICATION** T. A. Rector and D. S. De Young (eds.) Searching For Helical Magnetic
More informationRadio activity of BL Lacertae during gamma-ray outbursts
Radio activity of BL Lacertae during gamma-ray outbursts Daewon Kim (SNU) S. Trippe, S. Lee, J. Park, J. Oh, T. Lee,, G. Zhao, S. Kang, M. Kino, J. Kim, K. Wajima, and J. Algaba The 10th East Asian Meeting
More informationRadioAstron Early Science Program Space-VLBI AGN survey: strategy and first results
RadioAstron Early Science Program Space-VLBI AGN survey: strategy and first results Astro Space Center, Lebedev Physical Inst. RAS, Profsoyuznaya 84/32, 117997 Moscow, Russia Sternberg Astronomical Institute,
More informationThis is an electronic reprint of the original article. This reprint may differ from the original in pagination and typographic detail.
Powered by TCPDF (www.tcpdf.org) This is an electronic reprint of the original article. This reprint may differ from the original in pagination and typographic detail. Lister, M. L.; Homan, D. C.; Hovatta,
More informationAGILE and Blazars: the Unexpected, the Unprecedented, and the Uncut
AGILE and Blazars: the Unexpected, the Unprecedented, and the Uncut Rome, AGILE γ-ray Symposium 2017.12.12 Stefano Vercellone (INAF-OAB) 1 Rationale A review of the whole set of AGILE results on extra-galactic
More informationVLBI Observation of Radio Jets in AGNs
Vol.44 Suppl. ACTA ASTRONOMICA SINICA Feb., 2003 VLBI Observation of Radio Jets in AGNs D.R. Jiang & X.Y. Hong (Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030) Email: djiang@center.shao.ac.cn
More informationOrigin of X-rays in blazars
Origin of X-rays in blazars Greg Madejski, Stanford / KIPAC With much of the work presented here done by Amy Furniss, Masaaki Hayashida, Krzysztof Nalewajko, Marek Sikora, Jim Chiang, David Paneque, Mislav
More informationHunting for Dark Matter in Anisotropies of Gamma-ray Sky: Theory and First Observational Results from Fermi-LAT
Hunting for Dark Matter in Anisotropies of Gamma-ray Sky: Theory and First Observational Results from Fermi-LAT Eiichiro Komatsu (Texas Cosmology Center, Univ. of Texas at Austin) MPA Seminar, September
More informationarxiv: v1 [astro-ph] 8 Dec 2008
Studying the continuum spectrum of the parsec scale jets by multi-frequency VLBI measurements arxiv:0812.1486v1 [astro-ph] 8 Dec 2008 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn,
More informationActive Galactic Nuclei in the MeV-GeV band (first results from Fermi)
Active Galactic Nuclei in the MeV-GeV band (first results from Fermi) Gino Tosti University & INFN Perugia On behalf of the Fermi-LAT Collaboration 1 Active Galactic Nuclei (AGN) EGRET showed that AGN
More informationDoppler Boosting May Have Played No Significant Role in the Finding Surveys of Radio-Loud Quasars
International Journal of Astronomy and Astrophysics, 2012, 2, 52-61 http://dx.doi.org/10.4236/ijaa.2012.21008 Published Online March 2012 (http://www.scirp.org/journal/ijaa) Doppler Boosting May Have Played
More informationarxiv: v1 [astro-ph.he] 8 Jul 2014
Constraining the Physical Conditions in the Jets of γ-ray Flaring Blazars using Centimeter-Band Polarimetry and Radiative Transfer Simulations. I. Data and Models for 0420-014, OJ 287, & 1156+295 arxiv:1407.2194v1
More informationNEUTRINOS ON ICE THE SEARCH FOR THE COSMIC-RAY SOURCES FE KRAUSS, J. WILMS, M. KADLER, M. KRETER
NEUTRINOS ON ICE THE SEARCH FOR THE COSMIC-RAY SOURCES FE KRAUSS, J. WILMS, M. KADLER, M. KRETER FELICIA.KRAUSS@UVA.NL COSMIC RAYS 2a COSMIC RAYS 1896: Henri Becquerel discovery of radioactivity 1909:
More informatione-vlbi observations of the first gamma-ray nova V407 Cyg
e-vlbi observations of the first gamma-ray nova V407 Cyg Marcello Giroletti (INAF Istituto di Radioastronomia, Bologna) and E. Koerding, K. Sokolovsky, F. Schinzel, T. Cheung on behalf of the Fermi-LAT
More informationarxiv: v1 [astro-ph.ga] 31 Mar 2014
ASTRONOMICAL JOURNAL Preprint typeset using LATEX style emulateapj v. 04/17/13 MOJAVE: MONITORING OF JETS IN ACTIVE GALACTIC NUCLEI WITH VLBA EXPERIMENTS. XI. SPECTRAL DISTRIBUTIONS TALVIKKI HOVATTA Cahill
More informationUsing Faraday rotation sign-reversals to study magnetic fields in AGN jets
Using Faraday rotation sign-reversals to study magnetic fields in AGN jets University College Cork, Ireland E-mail: shaneosullivan@physics.org Denise Gabuzda University College Cork, Ireland E-mail: gabuzda@physics.ucc.ie
More informationPoS(11th EVN Symposium)104
Alert system for the VLBI database of ICRF2 sources. Preparatory case study. Aalto University Metsähovi Radio Observatory, Kylmälä, Finland E-mail: elizaveta.rastorgueva@aalto.fi Nataliya Zubko Finnish
More informationMillimeter VLBI of NGC1052: Pinpointing a Supermassive Black Hole
Millimeter VLBI of NGC52: Pinpointing a Supermassive Black Hole Anne-Kathrin Baczko,2,3 In Collaboration with: R. Schulz 2,3,4, E. Ros 3,4, M. Kadler, M. Perucho 4, J. Wilms MPIfR, Bonn; 2 Remeis Obs.
More informationNGC1052 Are jets evolving symmetrically?
NGC15 Are jets evolving symmetrically? Anne-Kathrin Baczko (MPIfR Bonn, Univ. Würzburg, Univ. Erlangen-Nürnberg) In Collaboration with: R. Schulz 1,,3, M. Kadler 3, E. Ros 4,5, T. P. Krichbaum 4, M. Perucho
More informationMultifrequency Polarization Properties of Blazars
Chin. J. Astron. Astrophys. Vol. 6 (2006), Suppl. 1, 247 252 (http://www.chjaa.org) Chinese Journal of Astronomy and Astrophysics Multifrequency Polarization Properties of Blazars S. Jorstad 1, A. Marscher
More informationTotal intensity radio variations in blazars. Talvikki Hovatta, Anne Lähteenmäki, Elina Nieppola, Ilona Torniainen, Merja Tornikoski
Total intensity radio variations in blazars Esko 1, Markku Lainela, Elina Lindfors, Pia-Maria Saloranta, Kaj Wiik Tuorla Observatory and Department of Physics, University of Turku Väisäläntie 20, FI-21500
More informationConstraining Dark Matter annihilation with the Fermi-LAT isotropic gamma-ray background
Constraining Dark Matter annihilation with the Fermi-LAT isotropic gamma-ray background Fiorenza Donato @ Physics Dept., Un. Torino The gamma-ray sky - Minneapolis, October 10, 2013 Plan of my talk What
More informationMultiband polarimetric and total intensity imaging of 3C 345
Multiband polarimetric and total intensity imaging of 3C 345 E. Ros a J.A. Zensus a A.P. Lobanov a a Max-Planck-Institut für Radioastronomie, Bonn, Germany We monitored the superluminal QSO 3C 345 at three
More informationarxiv:astro-ph/ v1 24 Oct 1997
The Caltech Jodrell Bank VLBI Surveys T. J. Pearson, 1 I. W. A. Browne, 2 D. R. Henstock, 2 A. G. Polatidis, 3 A. C. S. Readhead, 1 G. B. Taylor, 4 D. D. Thakkar, 5 R. C. Vermeulen, 6 P. N. Wilkinson,
More informationThe 2006 Giant Flare in PKS and Unidentified TeV Sources. Justin Finke Naval Research Laboratory 5 June 2008
The 2006 Giant Flare in PKS 2155-304 and Unidentified TeV Sources Justin Finke Naval Research Laboratory 5 June 2008 Outline Part I: The SSC Model Part II: The giant flare in PKS 2155-304 Part III: Blazars
More informationMonitoring of Blazars for variability from MIRO. Kiran S Baliyan Physical Research Laboratory, Ahmedabad, India
Monitoring of Blazars for variability from MIRO Kiran S Baliyan Physical Research Laboratory, Ahmedabad, India Black-holes, Jets and Outflows, Kathmandu, Nepal, October 14, 2013 Enigmatic AGNs AGNs- Huge
More informationPoS(IX EVN Symposium)011
Using Faraday Rotation Gradients to probe Magnetic Tower Models University College Cork, Ireland E-mail: mahmud@physics.ucc.ie Denise C. Gabuzda University College Cork, Ireland E-mail: gabuzda@physics.ucc.ie
More informationHigh-z Blazar SEDs Clues to Evolution in the Early Universe. Hongjun An Roger Romani on behalf of the Fermi-LAT Collaboration
High-z Blazar SEDs Clues to Evolution in the Early Universe Hongjun An Roger Romani on behalf of the Fermi-LAT Collaboration Outline Blazars Blazar emission and spectral energy distribution (SED) models
More informationarxiv:astro-ph/ v1 26 May 2005
ASTRONOMICAL JOURNAL Preprint typeset using LATEX style emulateapj v. 2/19/04 SUB-MILLIARCSECOND IMAGING OF QUASARS AND ACTIVE GALACTIC NUCLEI. IV. FINE SCALE STRUCTURE Y. Y. KOVALEV 1,2, K. I. KELLERMANN
More informationarxiv: v1 [astro-ph.he] 6 Nov 2018
Draft version November 7, 2018 Typeset using LATEX twocolumn style in AASTeX61 THE RADIO/GAMMA CONNECTION OF BLAZARS FROM HIGH TO LOW RADIO FREQUENCIES Xu-Liang Fan 1,2 and Qingwen Wu 1 arxiv:1811.02127v1
More informationThe nature of extragalactic radio-jets from high-resolution radio-interferometric observations.
Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8 12, 2014, in Teruel, Spain. A. J. Cenarro, F. Figueras, C. Hernández-
More informationPoS(11th EVN Symposium)094
18-22cm VLBA Observations of Three BL Lac Objects Denise Gabuzda University College Cork E-mail: fiona.m.healy@umail.ucc.ie VLBA polarization observations of the 135 AGNs in the MOJAVE-I sample have recently
More informationPulsar Wind Nebulae as seen by Fermi-Large Area Telescope
Pulsar Wind Nebulae as seen by Fermi-Large Area Telescope Marie-Hélène Grondin Centre d'etudes Nucléaires de Bordeaux- Gradignan SNR/PWN Workshop Montpellier, 2010 June 1 th M.-H. Grondin, SNR/PWN Wokshop,
More information