The Gaia mission and the variable objects
|
|
- Dominic White
- 5 years ago
- Views:
Transcription
1 The Gaia mission and the variable objects Laurent Eyer, N.Mowlavi, M.Varadi, M.Spano, Observatoire de Genève, Suisse G.Clementini, Université de Bologne, Italie Lundi, 29 Juin 2009 Kursaal Besançon, France
2 An attempt to organise the variable celestial objects Variability Tree Asteroids Extrinsic Intrinsic AGN Rotation Eclipse Stars Stars Microlensing Eclipse Rotation Eclipse Eruptive Cataclysmic Pulsation Secular Asteroid occultation EA Eclipsing binary EB Credit : L. Eyer & N. Mowlavi (03/2009) EW Planetary transits ELL FKCOM Single red giants β Per, α Vir SXA SX Arietis MS (B0-A7) with strong B fields ACV RCB Binary red giants α 2 Canes Venaticorum MS (B8-A7) with strong B fields BY Dra RS CVn DY Per UV Ceti Red dwarfs (K-M stars) FU PMS Be stars WR GCAS ZAND Symbiotic SN Supernovae LBV S Dor SPBe λ Eri N Novae ACYG α Cygni Hot OB Supergiants β Cephei UG Dwarf novae BCEP Slowly pulsating B stars PG 1159 (DO,V GW Vir) He/C/O-WDs SPB V361 Hya (EC14026) short period sdb V1093 Her (PG , Betsy) long period sdb V777 Her (DBV) He-WDs SXPHE SX Phoenicis PV Tel He star ZZ Ceti (DAV) H-WDs PMS δ Scuti DST δ Scuti Solar-like roap Photom. RR RR Lyrae GDOR FG Sge Sakurai, V605 Aql γ Doradus L SARV Small ampl. red var. CEP δ Cepheids SR Irregulars RV Period R Hya (Miras) δ Cep (Cepheid) M CW Miras Semiregulars RV Tau (W Vir) Type II Ceph. Gaia will detect most variable types on this tree
3 HR diagram for variable stars Gaia: Imagine million variable stars in this HR-diagram Precise statistical description of variable types Precise position of instability strips A.Gautschy 2008
4 Variable stars in 12 Colour-Magnitude Diagram Variable stars Eclipsing Be Cepheids:[Fund][1st Ov][2nd Ov] RRLyr:[rrab][rrc][rrd] [rre] Ellipsoidal Lpv (Long Period Variables) LMC OGLE data 14 Gaia: 1) Full description of HR 16 diagram (parallax) 2) better precision (detection of many additional types) Ecl. Bin. EW RV Tau 18 3) simultaneous data in G, BP, RP 4) Radial Velocities R CrB 20 V4334 Sgr FG Sge Added secular evolution v-i 4 Spano et al 2009
5 Fraction of variables from some surveys Hipparcos satellite: 3.3 years, 118,204 stars ASAS 1-2: 3 years, 140,000 stars 9.7 % variable stars Gaia: 10%? =100 million variables! 2.9 % variable stars OGLE-II: ~3-4 years, 40 million stars 0.7 % variable stars MOST satellite (J.Matthews, private communication) 20 % variable stars CoRoT satellite, 2.5 years, 120,000 stars (Debosscher s PhD Thesis) 40 % variable stars Kepler satellite, 3.5 years, 100,000 stars? % variable stars (a majority of variable stars?)
6 The Gaia mission: Observed Objets 1 billion stars (~100 million variable objets) 1 million galaxies -astrometry, photometry -spectro-photometry ~80 (40-250) measurements over 5 years 0.5 million QSO 0.3 million asteroids of our solar system mostly main belt asteroids -Radial Velocity Spectrometer ~40 (20-120) measurements over 5 years for objects brighter than G=14-15
7 The DPAConsortium: the global view Two main concepts: 1. Coordination Units 2. Data Processing Centres CU2 Simulation CU1 Architecture ESAC/BPC/OAOT CU3 Astrometry BPC/CNES CU4 Objects CU5 Photometry CU6 Spectroscopy CU7 Variability CU8 A.P. CNES Cambridge CNES ObsGE/ISDC CNES 385 people
8 CU7 Variability Analysis functional analysis
9 Study of Period search algorithm (J.Cuypers) Hipparcos data
10 CU7 Variability Analysis functional analysis
11 Specific Object Studies N.Mowlavi (ObsGe/ISDC)
12 Gaia Focal Plane 0.7 deg x0.7 deg
13 The Gaia photometric precision G-band In the G band transit photometry 20 mmag at G=20 Limiting magnitude of Gaia ~1 mmag at 10<G<14 per ccd observation per transit (9 CCDs) end-of-mission (80 observ.) C. Jordi modified by M.Varadi
14 The Gaia mission sampling properties Rotation of the satellite 6 hours, precession in 63 days Preceding-Following Field of View: 1h46 Following to Preceding FoV: 4h14 Gaps of about 30 days
15 A Number comparison of field oftransits over 5 years time differences and spectral windows
16 A comparison of time differences and spectral windows
17 Period recovery rate for strictly period signals 1. Signal(t)= A sin(2 π ν t + φ) + noise 2. Two parameters: a) S/N ratio = 0.75 b) Period = 1/ν = 0.2 day 3. Gaia sampling 4. Period search algorithm determine the success rate Aitoff projection in Ecliptic coordinates 90 (very defavorable case) Percentage Eyer & Mignard 2005
18 Period recovery rate: exploring the parameter space Frequency cycle/day 1 millimag error 1.3 millimag signal recovered % Normalised S/N = sqrt(nmes/80) S/N Eyer & Mignard 2005
19 More complex light curves: Simulated ZZ Ceti stars (pulsating white dwarfs) Simulation of a typical ZZ Ceti star (properties derived from the star GD29-38) Work done with Stefan Jordan (Heidelberg), code re-written by M.Varadi
20 Caveat: Pulsation assumed stable Analysis of simulated time series of GD multiperiodic signal + noise - 5 year long data set - Gaia sampling (AGISLab) 82*9=738 per-ccd data 2 frequencies with highest amplitude can be recovered correct period recovered Gaia Goal: Correct detection of such objects with possibilty main period & determination of luminosity
21 Transient variable: Microlensing and Supernovae 1) Microlensing: L. Wyrzykowski 1324 out of 1988 microlensing events from OGLE with at least one measurement within lensing event event duration > 30 days: rate is 93% OGLE Bulge Microlensing events D.Evans, I.Lecoeur, L.Eyer Algorithm of microlensing detection, high recovery rate on OGLE-II data 2) Supernovae (Gilmore & Belokurov): 6,000 to G=19 about 1/3 before maximum light
22 Ground based Observations Within Gaia Data Processing and Analysis Consortium (DPAC): Help to prepare the data reduction GBOG (Ground-Based Observations for Gaia, Coordinated by Caroline Soubiran) CU7: Use of HAT, SDSS, Hipparcos, OGLE, CU2; Super- Verify-Validate the data analysis Macho, CoRoT,... - CU5 for the Alert system - CU7 Scientific Community: Scientific exploitation (for example GREAT, Gaia Research for European Astronomy Training), following - Scientific follow-up of alerts, announcements - Catalogue releases Telescopes of 1m-2m, 2m-4m are valuable for the Gaia validation & science
23 Telescopes that could be used for CU7 Validation Onderjov Obs. Koubsky/Houdec 0.6-2m L.Figl Obs. Lebzelter 1-1.5m Castelgrande Obs. Ripepi 1.5m La Silla Chile Eyer Euler 1.2m La Silla Chile Koubsky Danish 1.5m CTIO, Chile Lebzelter SMARTS m La Palma Eyer Mercator 1.2m LaionaObs. Clementini 0.6-1m Pic du midi Shultheis 1-2m Pisykesteto Obs. Szabados 1m Maidanak Obs. Ibrahimov 2* m
24 Ground based observations Establish: List of (planned) instruments attached to the telescope the relevance for Gaia validation and science Importance for the future of telescopes
25 FIN! Merci pour votre intérêt
Studies of Peculiar Black Holes with Gemini Telescopes
Studies of Peculiar Black Holes with Gemini Telescopes Minjin Kim (KASI) In collaboration with Luis Ho (KIAA), Myungshin Im (Seoul National University), Peter Jonker (SRON), Francesca Onori (SRON) Contents
More informationVariable stars with LSST
Variable stars with LSST Laurent Eyer University of Geneva, Switzerland LSST@Europe3, Lyon, France Wednesday, 13 June 2018 The variability tree: A temptative to organise variable phenomena in the Universe
More informationInternational Science Development Teams (ISDT) Time-domain Science. Masaomi Tanaka (National Astronomical Observatory of Japan)
International Science Development Teams (ISDT) Time-domain Science Masaomi Tanaka (National Astronomical Observatory of Japan) ISDT members Initial member (2013 May)
More informationComplete Classification Conundrum
Complete Classification Conundrum Ashish Mahabal aam@astro.caltech.edu Center for Data-Driven Discovery (CD^3), Caltech Collaborators: CRTS, PTF, LSST, SAMSI, IUCAA teams SCMA VI, CMU, 20160607 Sky Maps
More informationStandard candles in the Gaia perspective
Standard candles in the Gaia perspective Laurent Eyer, L. Palaversa, N. Mowlavi, P.Dubath Geneva Observatory and S.Leccia, G.Clementini, et al., T.Lebzelter et al., Gaia CU7 DPAC Naples, May 6 2011 Plan
More informationarxiv: v1 [astro-ph.sr] 25 Apr 2018
Astronomy & Astrophysics manuscript no. GDR2CU7 c ESO 2018 April 26, 2018 arxiv:1804.09382v1 [astro-ph.sr] 25 Apr 2018 Gaia Data Release 2 Variable stars in the colour-absolute magnitude diagram Gaia Collaboration,
More informationIgor Soszyński. Warsaw University Astronomical Observatory
Igor Soszyński Warsaw University Astronomical Observatory SATELLITE vs. GROUND-BASED ASTEROSEISMOLOGY SATELLITE: Outstanding precision! High duty cycle (no aliases) HST MOST Kepler CoRoT Gaia IAU GA 2015,
More informationTransient Astronomy with the Gaia Satellite
Transient Astronomy with the Gaia Satellite Simon Hodgkin, Lukasz Wyrzykowski, Ross Burgon, Sergey Koposov, Nadejda Blagorodnova, Floor van Leeuwen, Vasily Belokurov, Laurent Eyer, Timo Prusti, Nic Walton
More informationarxiv: v1 [astro-ph] 21 Dec 2007
Variable stars across the observational HR diagram arxiv:0712.3797v1 [astro-ph] 21 Dec 2007 Laurent Eyer 1, Nami Mowlavi 1,2 1 Observatoire de Genève, Université de Genève, 1290 Sauverny, Switzerland 2
More informationBuilding the cosmic distance scale: from Hipparcos to Gaia
The Fundamental Distance Scale: state of the art and the Gaia perspectives 3-6 May 2011 Building the cosmic distance scale: from Hipparcos to Gaia Catherine TURON and Xavier LURI 1 ESA / ESO-H. Heyer Fundamental
More information468 Six dierent tests were used to detect variables, with dierent sensitivities to light-curve features. The mathematical expression for the limiting
467 PHOTOMETRIC ARIABILITY IN THE HR-DIAGRAM L. Eyer, M. Grenon Geneva Observatory, CH-129 Sauverny, Switzerland ABSTRACT The Hipparcos satellite has detected systematically variable stars when the amplitudes
More informationGaia: a new vision of our Galaxy and our neighbours
Mem. S.A.It. Vol. 85, 560 c SAIt 2014 Memorie della Gaia: a new vision of our Galaxy and our neighbours Annie C. Robin 1, C. Reylé 1, X. Luri 2, and the Gaia DPAC 1 Institut Utinam, CNRS-UMR6213, OSU THETA,
More informationClassification of CoRoT Exofield Light Curves
Classification of CoRoT Exofield Light Curves Report of the CVC Working Group J. Debosscher & L. M. Sarro & C. Aerts & W. Weiss SC, 14 March 2008 Automated classification of variables Current CVC implementation
More informationarxiv: v1 [astro-ph] 12 Nov 2008
Self-Organizing Maps. An application to the OGLE data and the Gaia Science Alerts Łukasz Wyrzykowski, and Vasily Belokurov arxiv:0811.1808v1 [astro-ph] 12 Nov 2008 Institute of Astronomy, University of
More informationarxiv: v2 [astro-ph.sr] 19 Jul 2011
Mon. Not. R. Astron. Soc. 000, 1 16 (2011) Printed 20 July 2011 (MN LATEX style file v2.2) Random forest automated supervised classification of Hipparcos periodic variable stars arxiv:1101.2406v2 [astro-ph.sr]
More informationAstronomy and Astrophysics
Landolt-Bornstein Numerical Data and Functional Relationships in Science and Technology New Series I Editor in Chief: W. Martienssen Group VI: Astronomy and Astrophysics Volume 3 Astronomy and Astrophysics
More informationResults of the OGLE-II and OGLE-III surveys
Mem. S.A.It. Vol. 77, 265 c SAIt 2006 Memorie della Results of the OGLE-II and OGLE-III surveys I. Soszyński 1,2 1 Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland 2 Universidad
More informationASTR STELLAR PULSATION COMPONENT. Peter Wood Research School of Astronomy & Astrophysics
ASTR 3007 - STELLAR PULSATION COMPONENT Peter Wood Research School of Astronomy & Astrophysics TOPICS COVERED Main types of variable stars Linear adiabatic pulsation theory => periods of pulsation Linear
More informationThe BRITE satellite and Delta Scuti Stars: The Magnificent Seven
Comm. in Asteroseismology Vol. 152, 2008 The BRITE satellite and Delta Scuti Stars: The Magnificent Seven M. Breger Institut für Astronomie, Türkenschanzstrasse 17, 1180 Vienna, Austria Abstract This paper
More informationMASS FUNCTION OF STELLAR REMNANTS IN THE MILKY WAY
MASS FUNCTION OF STELLAR REMNANTS IN THE MILKY WAY (pron: Woocash Vizhikovsky) Warsaw University Astronomical Observatory Wednesday Seminar, IoA Cambridge, 8 July 2015 COLLABORATORS Krzysztof Rybicki (PhD
More informationECLIPSING BINARIES: THE ROYAL ROAD. John Southworth (Keele University)
ECLIPSING BINARIES: THE ROYAL ROAD John Southworth (Keele University) Astrometric binaries: distant friends? William Herschel (1802) christened the term binary star Félix Savary (in 1827) established the
More informationScience Alerts from GAIA. Simon Hodgkin Institute of Astronomy, Cambridge
Science Alerts from GAIA Simon Hodgkin Institute of Astronomy, Cambridge Simon Hodgkin, IoA, Cambridge, UK 1 Discover the Cosmos, CERN, Sept 1-2 2011 A word on nomenclature Definition of a science alert:
More informationList of submitted target proposals
List of submitted target proposals Hans Kjeldsen, KASOC, Aarhus University - October 17, 2008 - Below is the complete list of target proposals submitted for the first targets selection round (October 2008).
More informationSimulations of the Gaia final catalogue: expectation of the distance estimation
Simulations of the Gaia final catalogue: expectation of the distance estimation E. Masana, Y. Isasi, R. Borrachero, X. Luri Universitat de Barcelona GAIA DPAC - CU2 Introduction Gaia DPAC (Data Processing
More informationPulsating stars plethora of variables and observational tasks
Pulsating stars plethora of variables and observational tasks László Szabados Konkoly Observatory, Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences Tatranská Lomnica, 24 September
More informationVariability Analysis of the Gaia data
Variability Analysis of the Gaia data Laurent Eyer 1 Nami Mowlavi 1, Dafydd W.Evans 2, Berry Holl 1, Lorenzo Rimoldini 1, Alessandro Lanzafame 3, Leanne Guy 1, Shay Zucker 4, Brandon Tingley 5, Isabelle
More information16th Microlensing Season of the Optical Gravitational Lensing Experiment
16th Microlensing Season of the Optical Gravitational Lensing Experiment A. Udalski Warsaw University Observatory 1 OGLE: The Optical Gravitational Lensing Experiment (1992 -.) http://ogle.astrouw.edu.pl
More informationPhotometric variability of luminous blue variable stars on different time scales
Photometric variability of luminous blue variable stars on different time scales Gantchev G. 1, Nedialkov P. 1, Ivanov V. 2, Ovcharov E. 1, Valcheva A. 1, Minev M. 1 ( 1 Department of Astronomy, Sofia
More informationChapter 9. Stars. The Hertzsprung-Russell Diagram. Topics for Today s Class. Phys1411 Introductory Astronomy Instructor: Dr.
Foundations of Astronomy 13e Seeds Phys1411 Introductory Astronomy Instructor: Dr. Goderya Chapter 9 Stars Cengage Learning 2016 Topics for Today s Class HR Diagram Variable Stars Intrinsic Variables Cepheids
More informationStellar Variability in a Survey of Field Stars
Publications of the Astronomical Society of the Pacific, 114:656 670, 2002 June 2002. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A. Stellar Variability in a Survey of
More informationarxiv: v1 [astro-ph.im] 13 Oct 2016
The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun Edited by G. A. Feiden Short timescale variables in stellar clusters: From Gaia to ground-based telescopes arxiv:1610.04008v1 [astro-ph.im]
More informationGaia: Mapping the Milky Way
Gaia: Mapping the Milky Way (A very brief overview, and something about the Swedish participation) Lennart Lindegren Lund Observatory Department of Astronomy and Theoretical Physics Lund University 1 Gaia
More informationIntrinsic variable types on the Hertzsprung Russell diagram. Image credit: Wikipedia
Studying intrinsically pulsating variable stars plays a very important role in stellar evolution understanding. The Hertzsprung-Russell diagram is a powerful tool to track which stage of stellar life is
More informationRømer Science Mission Plan
Institute of Physics and Astronomy, University of Aarhus Rømer Science Mission Plan Danish Small Satellite Programme Document No.(issue): MONS/IFA/MAN/PLN/0001(1) Date: 2001-05-29 Prepared by: Jørgen Christensen-Dalsgaard,
More informationFrom Gaia frame to ICRF-3 3?
From Gaia frame to ICRF-3 3? Univ. Nice Sophia-Antipolis & Observatory of the Côte de Azur 1 Outline Status of Gaia a QSOs with Gaia The Gaia-CRF From Gaia-CRF to ICRF-3 2 Gaia quick fact sheet Main goal
More informationFrequency estimation uncertainties of periodic signals
Frequency estimation uncertainties of periodic signals Laurent Eyer 1, Jean-Marc Nicoletti 2, S. Morgenthaler 3 (1) Department of Astronomy, University of Geneva, Sauverny, Switzerland (2) Swiss Statistics
More informationLecture 25: The Cosmic Distance Scale Sections 25-1, 26-4 and Box 26-1
Lecture 25: The Cosmic Distance Scale Sections 25-1, 26-4 and Box 26-1 Key Ideas The Distance Problem Geometric Distances Trigonometric Parallaxes Luminosity Distances Standard Candles Spectroscopic Parallaxes
More informationGaia Status & Early Releases Plan
Gaia Status & Early Releases Plan F. Mignard Univ. Nice Sophia-Antipolis & Observatory of the Côte de Azur Gaia launch: 20 November 2013 The big news @ 08:57:30 UTC 2 Gaia: a many-sided mission Driven
More informationGaia, LSST and binaries
Gaia, LSST and binaries Laurent Eyer, Nami Mowlavi, Berry Holl (University of Geneva, Switzerland) Zeljko Ivezic (Washinton Univ., USA) Simon Hodgkin, Dafydd Evans (Cambridge Univ., UK) Lukasz Wyrzykowski
More informationPLATO Follow-up. Questions addressed. Importance of the follow-up. Importance of the follow-up. Organisa(on*&*Progress*Report
PLATO Follow-up Organisa(on*&*Progress*Report Questions addressed A next generation transit mission will be efficient only with ground-based help S. Udry University of Geneva (Geneva Observatory) Needs
More informationOutline. ESA Gaia mission & science objectives. Astrometric & spectroscopic census of all stars in Galaxy to G=20 mag.
Atomic Data Requirements for Large Spectroscopic Surveys: ESA Gaia and ESO GES Alex Lobel Royal Observatory of Belgium Outline ESA Gaia mission & science objectives. Astrometric & spectroscopic census
More informationarxiv:astro-ph/ v1 15 Nov 2005
Astrophysics of Variable Stars ASP Conference Series, Vol. 999, 2006 C. Sterken & C. Aerts Astronomical databases, Space photometry and time series analysis: Open questions arxiv:astro-ph/0511458v1 15
More informationLecture 10. Advanced Variable Star Stuff. March :00 PM BMPS 1420
Lecture 10 Advanced Variable Star Stuff March 18 2003 8:00 PM BMPS 1420 This week's topics Types of Variables Eclipsing binaries Pulsating variables Cepheid RR Lyrae δ Scuti Cataclysmic variables Eclipsing
More informationThe Gaia Mission. Coryn Bailer-Jones Max Planck Institute for Astronomy Heidelberg, Germany. ISYA 2016, Tehran
The Gaia Mission Coryn Bailer-Jones Max Planck Institute for Astronomy Heidelberg, Germany ISYA 2016, Tehran What Gaia should ultimately achieve high accuracy positions, parallaxes, proper motions e.g.
More informationIntroduction The Role of Astronomy p. 3 Astronomical Objects of Research p. 4 The Scale of the Universe p. 7 Spherical Astronomy Spherical
Introduction The Role of Astronomy p. 3 Astronomical Objects of Research p. 4 The Scale of the Universe p. 7 Spherical Astronomy Spherical Trigonometry p. 9 The Earth p. 12 The Celestial Sphere p. 14 The
More informationTidal Disruption Events in OGLE and Gaia surveys
Tidal Disruption Events in OGLE and Gaia surveys Łukasz Wyrzykowski (pron: Woo-cash Vi-zhi-kov-ski) Warsaw University Astronomical Observatory, Poland IAU Symposium, New Frontiers in BH Astrophysics, Lubljana
More informationPeriod Analysis of AAVSO Visual Observations of 55 Semiregular (SR/SRa/SRb) Variable Stars
Percy and Tan, JAAVSO Volume 41, 2013 1 Period Analysis of AAVSO Visual Observations of 55 Semiregular (SR/SRa/SRb) Variable Stars John R. Percy Paul Jx Tan Department of Astronomy and Astrophysics, University
More informationThe Three Dimensional Universe, Meudon - October, 2004
GAIA : The science machine Scientific objectives and impacts ------- F. Mignard OCA/ Cassiopée 1 Summary Few figures about Gaia Gaia major assets What science with Gaia Few introductory highlights Conclusion
More informationMicrolensing towards the Galactic Centre with OGLE
Microlensing towards the Galactic Centre with OGLE Łukasz Wyrzykowski (pron.: woo-cash vi-zhi-kov-ski) Warsaw University Astronomical Observatory, Poland Institute of Astronomy, University of Cambridge,
More informationMassive OB stars as seen by Gaia
Massive OB stars as seen by Gaia Y.Frémat Royal Observatory of Belgium Y.Frémat, 22.06.2015 EWASS SP7 Massive OB stars as seen by Gaia 1 / 17 OB stars in the Gaia Universe Model Robin et al., 2012, A&A,
More informationHD Transits HST/STIS First Transiting Exo-Planet. Exoplanet Discovery Methods. Paper Due Tue, Feb 23. (4) Transits. Transits.
Paper Due Tue, Feb 23 Exoplanet Discovery Methods (1) Direct imaging (2) Astrometry position (3) Radial velocity velocity Seager & Mallen-Ornelas 2003 ApJ 585, 1038. "A Unique Solution of Planet and Star
More informationWhite dwarf populations. Gijs Nelemans Radboud University Nijmegen
White dwarf populations Gijs Nelemans Radboud University Nijmegen Outline Introduction: Population synthesis Basic ingredients Observational inputs White dwarf populations Different types and mergers WD
More informationOpen Research Online The Open University s repository of research publications and other research outputs
Open Research Online The Open University s repository of research publications and other research outputs Photometric science alerts from Gaia Conference or Workshop Item How to cite: Wyrzykowski, Lukasz;
More informationarxiv: v1 [astro-ph.im] 23 Apr 2014
Astronomy & Astrophysics manuscript no. GOG33 c ESO 1 April, 1 arxiv:1v1 [astro-ph.im] 3 Apr 1 Overview and stellar statistics of the expected Gaia Catalogue using the Gaia Object Generator X. Luri 1,
More informationGaia Data Processing - Overview and Status
Gaia Data Processing - Overview and Status Anthony Brown Leiden Observatory, Leiden University brown@strw.leidenuniv.nl Teamwork to deliver the promise of Gaia 10+ years of effort 450 scientists and engineers
More informationPhysics Lab #6: Citizen Science - Variable Star Zoo
Physics 10263 Lab #6: Citizen Science - Variable Star Zoo Introduction This lab is the another Citizen Science lab we will do together this semester as part of the zooniverse.org project family. This time,
More informationScience Olympiad Astronomy C Division Event. National Cathedral School Invitational Washington, DC December 3 rd, 2016
Science Olympiad Astronomy C Division Event National Cathedral School Invitational Washington, DC December 3 rd, 2016 Name: Start Time: Directions: 1) Please turn in all materials at the end of the event.
More informationMicrovariability of Red Giant Stars
Part 2A: Mowlavi and Jorissen, JAAVSO Volume 35, 2006 91 Microvariability of Red Giant Stars N. Mowlavi Observatoire de Genève, CH-1290 Versoix, Switzerland A. Jorissen Chercheur Qualifiè F.N.R.S., Institut
More informationSelection of stars to calibrate Gaia
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 informationThe Plato Input Catalog (PIC)
The Plato Input Catalog (PIC) Giampaolo Piotto and the WP130000 group Dipartimento di Fisica e Astronomia Universita di Padova Because of the huge size of PLATO field (~2124 sq deg) and the consequent
More informationAsterosismologia presente e futuro. Studio della struttura ed evoluzione delle stelle per mezzo delle oscillazioni osservate sulla superficie
Asterosismologia presente e futuro Studio della struttura ed evoluzione delle stelle per mezzo delle oscillazioni osservate sulla superficie Asterosismologia In Italia Personale coinvolto nel 2010 (22)
More informationPLATO-2.0 Follow-up. Questions addressed. PLATO Follow-up activities. Mass distribution Spectroscopy. Small mass planets are numerous => huge work
PLATO-20 Follow-up PLATO Follow-up activities Context'and'organisaon S Udry University of Geneva Overall PSPM structure The prime science product of PLATO = sample of fully characterized planets (various
More informationGREAT. Kick-off meeting
1 Kick-off meeting Presentation of the DPAC ------- Outline Presentation primarily designed for non-dpac participants Formation of the DPAC Organisation and responsibilities Composition 2 Gaia objective
More informationPan-Planets with PANSTARRS1. And : CfA, John Hopkins Uni., UK Consortium, Centr. Uni. Taiwan
Pan-Planets with PANSTARRS1 And : CfA, John Hopkins Uni., UK Consortium, Centr. Uni. Taiwan Panoramic Survey Telescope and Rapid Response System The renaissance of wide-field imaging Wide-field imaging
More informationObservations of Pulsating Stars
Observations of Pulsating Stars Noel Richardson April 15, 2008 1 Introduction Pulsating stars are stars that show some sort of instability, often which can be called vibration or oscillation just as easily
More informationLANDOLT-BORNSTEIN. Zahlenwerte und Funktionen aus Naturwissenschaften und Technik Neue Serie Gesamtherausgabe: K.- H. Hellwege
LANDOLT-BORNSTEIN Zahlenwerte und Funktionen aus Naturwissenschaften und Technik Neue Serie Gesamtherausgabe: K.- H. Hellwege Gruppe VI: Astronomie Astrophysik und Weltraumforschung Band 2 Astronomie und
More informationChapter 12 Stellar Evolution
Chapter 12 Stellar Evolution Guidepost This chapter is the heart of any discussion of astronomy. Previous chapters showed how astronomers make observations with telescopes and how they analyze their observations
More informationActuality of Exoplanets Search. François Bouchy OHP - IAP
Actuality of Exoplanets Search François Bouchy OHP - IAP How detect extrasolar planets? Two main difficulties : 1 A tiny angular separation 0.75 arcsec Sun Jupiter at 4 light years 4 Sun Jupiter at 100
More informationAsteroseismology in Action: Probing the interiors of EHB stars
Asteroseismology in Action: Probing the interiors of EHB stars Suzanna Randall, ESO Garching Betsy Green, University of Arizona Gilles Fontaine, Université de Montréal Stéphane Charpinet, Observatoire
More informationarxiv:astro-ph/ v1 25 Mar 2003
Reanalysis of the OGLE-I Observations with the Image Subtraction Method I. Galactic bar fields MM1-A, MM1-B, MM7-A, and MM7-B 1 by A. P i g u l s k i, Z. K o ł a c z k o w s k i and G. K o p a c k i Wrocław
More informationDelta Scuti stars: Observational aspects
Comm. in Asteroseismology Vol. 150, 2007 Delta Scuti stars: Observational aspects M. Breger Institute of Astronomy, University of Vienna, 1180 Vienna, Austria Abstract The review concentrates on several
More informationarxiv: v1 [astro-ph.ep] 4 Nov 2014
Mem. S.A.It. Vol., c SAIt 22 Memorie della Finding Hot-Jupiters by Gaia photometry using the Directed Follow-Up strategy arxiv:4.822v [astro-ph.ep] 4 Nov 24 Y. Dzigan and S. Zucker 2 Particle Physics and
More informationTHE GALACTIC BULGE AS SEEN BY GAIA
143 THE GALACTIC BULGE AS SEEN BY GAIA C. Reylé 1, A.C. Robin 1, M. Schultheis 1, S. Picaud 2 1 Observatoire de Besançon, CNRS UMR 6091, BP 1615, 25010 Besançon cedex, France 2 IAG/USP Departamento de
More informationTechniques for measuring astronomical distances generally come in two variates, absolute and relative.
Chapter 6 Distances 6.1 Preliminaries Techniques for measuring astronomical distances generally come in two variates, absolute and relative. Absolute distance measurements involve objects possibly unique
More informationPDF hosted at the Radboud Repository of the Radboud University Nijmegen
PDF hosted at the Radboud Repository of the Radboud University Nijmegen The following full text is a publisher's version. For additional information about this publication click this link. http://hdl.handle.net/2066/36085
More informationReanalysis of the OGLE-I Observations with the Image Subtraction Method. I. Galactic Bar Fields MM1-A, MM1-B, MM7-A, and MM7-B 1
ACTA ASTRONOMICA Vol. 53 (2003) pp. 27 50 Reanalysis of the OGLE-I Observations with the Image Subtraction Method. I. Galactic Bar Fields MM1-A, MM1-B, MM7-A, and MM7-B 1 by A. P i g u l s k i, Z. K o
More informationScience Olympiad Astronomy C Division Event National Exam
Science Olympiad Astronomy C Division Event National Exam University of Central Florida May 17, 2014 Team Number: Team Name: Instructions: 1) Please turn in all materials at the end of the event. 2) Do
More informationDelaware Asteroseismic Research Center. Asteroseismology with the Whole Earth Telescope (and More!)
Delaware Asteroseismic Research Center Asteroseismology with the Whole Earth Telescope (and More!) Asteroseismology Study of interior stellar structure as revealed by global oscillations. Important- -
More informationGaia: algorithms for the external calibration
Gaia: algorithms for the external calibration Montegriffo P., Cacciari C., Ragaini S. Edinburgh (Royal Observatory) Cambridge (Institute of Astronomy) (CU5 leadership) Leiden (Observatory) Bologna (INAF-OABO)
More informationVariable Stars South. Who we are What we do. 2
Who we are What we do www.variablestarssouth.org 2 We are a group of amateur astronomers. Mainly from Australia New Zealand with a few from other parts of the globe We study stars that vary in brightness
More informationRecent Researches concerning Semi-Regular Variables
Recent Researches concerning Semi-Regular Variables I.S. Glass (SAAO) ASSA Symposium, Durban 2008 Distances in the Universe - the distance ladder a summary Trig parallaxes only direct method Variable stars
More informationSynergies between E-ELT and space instrumentation for extrasolar planet science
Synergies between E-ELT and space instrumentation for extrasolar planet science Raffaele Gratton and Mariangela Bonavita INAF Osservatorio Astronomico di Padova - ITALY Main topics in exo-planetary science
More informationarxiv: v1 [astro-ph.ep] 20 Nov 2012
Mon. Not. R. Astron. Soc., 7 (22) Printed September 28 (MN LATEX style file v2.2) Directed follow-up strategy of low-cadence photometric surveys in Search of Transiting Exoplanets - II. application to
More informationThe cosmic distance scale
The cosmic distance scale Distance information is often crucial to understand the physics of astrophysical objects. This requires knowing the basic properties of such an object, like its size, its environment,
More informationCompact Pulsators Observed by Kepler
Compact Pulsators Observed by Kepler KU Leuven, Belgium Introduction Today I will introduce the KASC survey for compact pulsators in the Kepler field Most of these pulsators are hot subdwarf stars the
More informationGaia. Stereoscopic Census of our Galaxy. one billion pixels for one billion stars
Gaia Stereoscopic Census of our Galaxy http://www.cosmos.esa.int/web/gaia http://gaia.ac.uk one billion pixels for one billion stars one percent of the visible Milky Way Gerry Gilmore, UK Gaia PI, on behalf
More informationThe overture to a new era in Galactic science: Gaia's first data release. Martin Altmann Centre for Astrophysics of the University of Heidelberg
The overture to a new era in Galactic science: Gaia's first data release Martin Altmann Centre for Astrophysics of the University of Heidelberg Bogota, Gaia facts The promise The optical plane Scan law
More informationGaia News:Counting down to launch A. Vallenari. INAF, Padova Astronomical Observatory on behalf of DPACE
Gaia News:Counting down to launch A. Vallenari INAF, Padova Astronomical Observatory on behalf of DPACE Outline Gaia Spacecraft status The Gaia sky Gaia open and globular clusters From data to science:
More informationMira variables They have very regular light curves, with amplitude V > 2.5 m, and periods Π > 100 days.
5 Pulsations Most AGB stars are variable stars, due to the fact that they pulsate. The periods are long, from 10 to 1000s of days, and they are therefore called Long Period Variables, or LPVs. These long
More informationGaia. Stereoscopic Census of our Galaxy. one billion pixels for one billion stars
Gaia Stereoscopic Census of our Galaxy http://www.cosmos.esa.int/web/gaia http://gaia.ac.uk one billion pixels for one billion stars one percent of the visible Milky Way Gerry Gilmore FRS, UK Gaia PI,
More informationGAIA: SOLAR SYSTEM ASTROMETRY IN DR2
GAIA: SOLAR SYSTEM ASTROMETRY IN DR2 P. Tanga 1, F. Spoto 1,2 1 Observatoire de la Côte d Azur, Nice, France 2 IMCCE, Observatoire de Paris, France 2 Gaia is observing asteroids - Scanning the sky since
More informationThe global flow reconstruction of chaotic stellar pulsation
The global flow reconstruction of chaotic stellar pulsation Emese Plachy Konkoly Observatory, Budapest 1 Nonlinear behavior in variable stars Nonlinear coupling of oscillation modes RADIAL fundamental
More informationAstr As ome tr tr ome y I M. Shao
Astrometry I M. Shao Outline Relative astrometry vs Global Astrometry What s the science objective? What s possible, what are fundamental limits? Instrument Description Error/noise sources Photon noise
More informationGaia: Astrometric performance and current status of the project
Relativity in Fundamental Astronomy Proceedings IAU Symposium No. 261, 2009 S. A. Klioner, P. K. Seidelman & M. H. Soffel, eds. c International Astronomical Union 2010 doi:10.1017/s1743921309990548 Gaia:
More informationExoplanetary transits as seen by Gaia
Highlights of Spanish Astrophysics VII, Proceedings of the X Scientific Meeting of the Spanish Astronomical Society held on July 9-13, 2012, in Valencia, Spain. J. C. Guirado, L.M. Lara, V. Quilis, and
More informationOutline. Go over AGN problem, again, should be rotating BH Go over problem 6.6 Olber's paradox Distances Parallax Distance ladder Direct checks
Outline Go over AGN problem, again, should be rotating BH Go over problem 6.6 Olber's paradox Distances Parallax Distance ladder Direct checks Why is the night sky dark? (Olber s Paradox 1826) Or what
More informationVariability of β Cephei and SPB stars
Variability of β Cephei and SPB stars GAIA Variable Stars Working Group C. Neiner & P. De Cat In this manuscript, we briefly characterize the β Cephei and SPB stars, two classes of hot pulsating stars
More informationCIRCULAR No JULY
BRITISH ASTRONOMICAL ASSOCIATION: CIRCULAR No. 19 1974 JULY VARIABLE STAR SECTION Director: Charts: Secretary: J E Isles S J Anderson D R B Saw 292 Caledonian Road 20 Bloomfield Ave 12 Taylor Road London
More informationNew measurements and analysis of the β Cephei star V909 Cassiopeiae
New measurements and analysis of the β Cephei star V909 Cassiopeiae David R. S. Boyd 1, Robert A. Koff 2 1 West Challow Observatory, Variable Star Section, British Astronomical Association [davidboyd@orion.me.uk]
More informationTHE CONNECTION BETWEEN DELTA SCUTI STARS AND CLOSE BINARY PARAMETERS A THESIS SUBMITTED TO THE GRADUATE SCHOOL
THE CONNECTION BETWEEN DELTA SCUTI STARS AND CLOSE BINARY PARAMETERS A THESIS SUBMITTED TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE MASTER OF SCIENCE IN PHYSICS BY
More information