Solar-like oscillations in intermediate mass stars
|
|
- Louise Douglas
- 5 years ago
- Views:
Transcription
1 Solar-like oscillations in intermediate mass stars Victoria Antoci SAC (Stellar Astrophysics Centre), Aarhus University, Denmark
2 Why are intermediate mass stars so important? Credit: Kupka & Weiss Transition from deep and effective to shallow convective envelope. 2. Rotational boundary. Implications differential rotation activity transport of angular momentum mixing diffusion mass loss pulsation magnetic fields Credit: Royer 2009
3 Granulation observed in A type stars chromospheric activity (Simon 2002) : boundary at Teff> 8250K convective motion in the the atmospheres of A and Am stars (spectroscopy, e.g. Landstreet et al. 2009) strong evidence from photometry for granulation noise (Kallinger & Matthews 2010) Credit: Kallinger & Matthews 2010 Credit: Hans Kjeldsen
4 Asteroseismic HRD of pulsating stars κ mechanism acts like a heat engine stochastic excitation by the vigorous convective motion generating acoustic noise, a.k.a. solar-like oscillations convective blocking Credit: J. Christensen-Dalsgaard, G. Handler
5 Asteroseismic HRD of pulsating stars κ mechanism acts like a heat engine stochastic excitation by the vigorous convective motion generating acoustic noise, a.k.a. solar-like oscillations convective blocking Credit: J. Christensen-Dalsgaard, G. Handler
6 Asteroseismic HRD of pulsating stars κ mechanism acts like a heat engine stochastic excitation by the vigorous convective motion generating acoustic noise, a.k.a. solar-like oscillations convective blocking Credit: J. Christensen-Dalsgaard, G. Handler
7 Asteroseismic HRD of pulsating stars κ mechanism acts like a heat engine stochastic excitation by the vigorous convective motion generating acoustic noise, a.k.a. solar-like oscillations convective blocking Credit: J. Christensen-Dalsgaard, G. Handler
8 Solar-like oscillations Credit: Houdek 2006 Amplitudes can be (more or less) predicted ALL modes in a certain frequency region are damped and re-excited ( by vigorous convective motion) max frequency of maximum power ( ) high radial order p modes (asymptotic relation, Tassoul 1980,1990) => large frequency separation (mean density) => small frequency separation (chemical composition=>age)
9 max Solar-like oscillations Credit: Houdek 2006 Amplitudes can be (more or less) predicted ALL modes in a certain frequency region are damped and re-excited ( by vigorous convective motion) max frequency of maximum power ( ) high radial order p modes (asymptotic relation, Tassoul 1980,1990) => large frequency separation (mean density) => small frequency separation (chemical composition=>age)
10 max Solar-like oscillations Credit: Houdek 2006 Amplitudes can be (more or less) predicted ALL modes in a certain frequency region are damped and re-excited ( by vigorous convective motion) frequency of maximum power ( ) Credit: GOLF team, from Aerts et al max high radial order p modes (asymptotic relation, Tassoul 1980,1990) => large frequency separation (mean density) => small frequency separation (chemical composition=>age)
11 max Solar-like oscillations Credit: Houdek 2006 Amplitudes can be (more or less) predicted ALL modes in a certain frequency region are damped and re-excited ( by vigorous convective motion) frequency of maximum power ( ) Credit: GOLF team, from Aerts et al max high radial order p modes (asymptotic relation, Tassoul 1980,1990) => large frequency separation (mean density) => small frequency separation (chemical composition=>age)
12 max Solar-like oscillations Credit: Houdek 2006 Amplitudes can be (more or less) predicted ALL modes in a certain frequency region are damped and re-excited ( by vigorous convective motion) frequency of maximum power ( ) Credit: GOLF team, from Aerts et al max high radial order p modes (asymptotic relation, Tassoul 1980,1990) => large frequency separation (mean density) => small frequency separation (chemical composition=>age)
13 Ensemble Asteroseismology of solar-like stars = M M 1 2 R R 3 2 max = M/M (R/R) 2p T e /T e max Kjeldsen & Bedding (1995) Credit: Huber et al =(0.263 ± 0.009)µHz( max /µhz) 0.772±0.005 Credit: Chaplin et al., Sci, 2011 Stello et al. (2009)
14 Solar like pulsation predicted to be excited at the red border of the instability strip by Houdek et al. (1999) and Samadi et al. (2002). A and F type stars: PMS, MS, immediate post MS chemically peculiar and normal stars roap stars Doradus stars δ Scuti stars Credit: J. Christensen-Dalsgaard, G. Handler
15 (rapidly oscillating) Ap stars strong global magnetic fields: 1-25 kg = large spots strong vertical stratification κ mechanism in the H ionization zone: magnetic field suppresses convection at the magnetic poles reducing the damping (Balmforth et al. 2001) Credit: Lueftinger et al. (2010)
16 rapidly oscillating Ap (roap) stars high radial order p modes ( ) periods similar to the Sun (4-20 min.) oblique pulsator model (pulsation axes between magnetic and rotation axes; Kurtz (1982), Bigot & Dziembowski (2002) new observations suggest more than one axes of pulsation (Kurtz et al 2011). NO solar-like oscillations in ro Ap stars observed but also not expected
17 Doradus stars high radial order gravity modes with periods days (Balona, Krisciunas & Cousins 1994, Kaye et al. 1999, Handler 1999, Uytterhoeven et al. 2011, Balona et al. 2011,... ) convective blocking mechanism: acts also like a heat engine, the base of the convective zone is the driving region (Guzik et al. 2000; Dupret et al. 2005) convective envelope between xx and yy (Guzik et al. 2000). Dors outside the predicted IS => if the convective blocking mechanism is correct then convective envelope MUST have a specific depth => convection up to higher Teffs Credit: Uytterhoeven et al. 2011
18 Doradus stars from theoretical point of view should be the perfect candidates to show solar-like oscillations. s o f a r n o s o l a r- l i k e oscillations in gamma Dor stars and we do not understand why! observational bias? Tkachenko et al. 2012
19 δ Scuti stars pre-ms, MS and post-ms M Teff= K Pop I + II mean v sin i = 100 km/s radial & nonradial pulsation many hybrids ( Sct & Dor) p-,g- and mixed modes coherent pulsation (K mechanism) amplitudes cannot be predicted! not all modes are excited to observable amplitudes mode ID very time consuming
20 Frequency [c/d] HD a.k.a. Superstar based on Q3.2 data
21 Can the K-mechanism continuously excite the range c/d ( μhz)?
22 Can the K-mechanism continuously excite the range c/d ( μhz)? observed
23 κ-κ hybrid? Am star (atmospheric under-abundances in Sc and Ca, overabund. in Ba, Sr, Y). No large scale magnetic fields in Am stars (Auriere et al. 2010) => no roap/δ Scuti hybrid. (by the way Carrier et al spectroscopic binary Am HD star (which is not classified as a δ Sct star), but did not detect any Pulsation from companion? Peaks between 43 and 75 c/d from a solar-type star? Unlikely! F type star => would be visible in spectrum, which is not! δ Scuti pulsation from companion? A or F type star => companion would be visible in spectrum, which is not! Contamination from other star <1.5% From RV (7 spectra in 153 days) no indication of binarity either.
24 No combination frequencies => high radial overtones as expected for solar-like oscillations. but is the driving really the convection in the outer layers? Δν 3.5c/d (40.5 μhz) ~ ν max c/d ( μhz) (using the scaling relation from Stello et al. 2009) observed ν max
25 Temporal behaviour of different modes δ Scuti mode Frequency [c/d] Sun Solar-like mode in Superstar
26 strong evidence for solar-like oscillations in δ Scuti stars as predicted by Houdek et al. (1999) & Samadi et al (2002) because of the striking similarities between the observed signal at high frequencies and the properties of stochastically excited pulsation HD is the first δ Scuti star showing strong evidence for solar-like oscillations.
27 Q3+Q7+Q8+Q9+Q10+Q11
28 Stochastic mode? or just amplitude variations...? 450 days cannot resolve the peaks.
29 Is Superstar a δ Sct/ Dor/ solar-like oscillator???
30 Is Superstar a δ Sct/ Dor/ solar-like oscillator??? 3rd order combination? unlikely! has high ampli. Due to rotation? =>~2/3 of Vcrit. Remember is an Am star!
31 Is Superstar a δ Sct/ Dor/ solar-like oscillator??? 3rd order combination? unlikely! has high ampli. Due to rotation? =>~2/3 of Vcrit. Remember is an Am star! independent g-mode
32 Is Superstar a δ Sct/ Dor/ solar-like oscillator??? 3rd order combination? unlikely! has high ampli. Due to rotation? =>~2/3 of Vcrit. Remember is an Am star! independent g-mode 3rd order combination???
33 Splittings, splittings! My kingdom for some splittings... I can understand! 0.08 c/d= 0.92muHz Rotation? Yes can be, but there are splittings which cannot be due to rotation. Magnetic fields? Am stars seem not to have large scale magnetic fields. Companion(s)? Every mode would be split, which is not.
34 Another Superstar?
35 Thank you! 谢谢
arxiv: v1 [astro-ph.sr] 27 Dec 2011
**Volume Title** ASP Conference Series, Vol. **Volume Number** **Author** c **Copyright Year** Astronomical Society of the Pacific Hybrid pulsators among A/F-type stars arxiv:1112.5981v1 [astro-ph.sr]
More informationAsteroseismology of Red Giants. Josefina Montalbán Université de Liège
Asteroseismology of Red Giants Josefina Montalbán Université de Liège Stellar oscillations Oscillation mode Variations of v r : spectroscopy Variations of luminosity: photometry Basic properties Lamb Frequency:
More informationSeminar: Measurement of Stellar Parameters with Asteroseismology
Seminar: Measurement of Stellar Parameters with Asteroseismology Author: Gal Kranjc Kušlan Mentor: dr. Andrej Prša Ljubljana, December 2017 Abstract In this seminar I introduce asteroseismology, which
More informationThe physics of red-giant oscillations
The physics of red-giant oscillations Marc-Antoine Dupret University of Liège, Belgium The impact of asteroseismology across stellar astrophysics Santa Barbara, 24-28 oct 2011 Plan of the presentation
More informationTDC on solar-like stars. A. Grigahcène, M.-A. Dupret, M. Gabriel, R. Scuflaire and R. Garrido
2011 TDC on solar-like stars A. Grigahcène, M.-A. Dupret, M. Gabriel, R. Scuflaire and R. Garrido A long outstanding problem Model and Modal Effects Model effects EOS: Mihalas et al. 1990; Rogers, Swenson,
More informationSupporting Online Material for
www.sciencemag.org/cgi/content/full/science.1201939/dc1 Supporting Online Material for Kepler-Detected Gravity-Mode Period Spacings in a Red Giant Star P. G. Beck,* T. R. Bedding, B. Mosser, D. Stello,
More informationObserved solar frequencies. Observed solar frequencies. Selected (two) topical problems in solar/stellar modelling
Selected (two) topical problems in solar/stellar modelling Stellar Astrophysics Centre Improving solar physics by studying other stars Günter Houdek The effect of the surface layers on the oscillation
More informationFrequency in c/d
Tidal Evolution and Oscillations in Binary Stars ASP Conference Series, Vol. 333, 2005 A. Claret, A. Giménez and J.-P. Zahn, eds. Binarity and Pulsation: What do low-frequency peaks in the Fourier Diagram
More informationProbing Stellar Structure with Pressure & Gravity modes the Sun and Red Giants. Yvonne Elsworth. Science on the Sphere 14/15 July 2014
Probing Stellar Structure with Pressure & Gravity modes the Sun and Red Giants Yvonne Elsworth Science on the Sphere 14/15 July 2014 Evolving stars are building blocks of the galaxy and their cores are
More informationTESS Proposal on behalf of TASC WG 4 Cadence: 2-min sampling
TESS Proposal on behalf of TASC WG 4 Cadence: 2-min sampling Title: A survey of rapidly oscillating Ap stars Abstract: The magnetic, and chemically peculiar nature of the rapidly oscillating Ap (roap)
More informationarxiv: v1 [astro-ph] 3 Jul 2008
Transiting Planets Proceedings IAU Symposium No. 253, 2008 c 2008 International Astronomical Union DOI: 00.0000/X000000000000000X Measurements of Stellar Properties through Asteroseismology: A Tool for
More informationSONG overview. Jørgen Christensen-Dalsgaard Department of Physics and Astronomy Aarhus University
SONG overview Jørgen Christensen-Dalsgaard Department of Physics and Astronomy Aarhus University The SONG concept Network of 8 telescopes with a global distribution Long, nearly continuous observations
More informationObservations of Red Giants in the NGC 6633 cluster by the Space Mission CoRoT
Observations of Red Giants in the NGC 6633 cluster by the Space Mission CoRoT C. Barban 1 F. Baudin 2, E. Poretti 3, B. Mosser 1, S. Hekker 4, Th. Kallinger 5, A. Miglio 6, J. Montalban 7, T. Morel 7,
More informationDo red giants have short mode lifetimes?
Mem. S.A.It. Vol. 77, 406 c SAIt 2006 Memorie della Do red giants have short mode lifetimes? D. Stello 1,2,3, H. Kjeldsen 1, T. R. Bedding 2, and D. Buzasi 3 1 Institute for Fysik og Astronomi (IFA), Aarhus
More informationThe effects of stellar rotation and magnetism on oscillation frequencies
The effects of stellar rotation and magnetism on oscillation frequencies Daniel Reese Joint HELAS and CoRoT/ESTA Workshop 20-23 November 2006, CAUP, Porto - Portugal Introduction traditionally, stellar
More informationAsteroseismology with WFIRST
Asteroseismology with WFIRST Daniel Huber Institute for Astronomy University of Hawaii Sagan Workshop August 2017 Crash Course in Asteroseismology Crash Course in Asteroseismology? unnamed author, sometime
More informationHD , the Most Peculiar Star: First Results from Precise Radial Velocity Study
J. Astrophys. Astr. (2005) 26, 185 191 HD 101065, the Most Peculiar Star: First Results from Precise Radial Velocity Study D. E. Mkrtichian 1 & A. P. Hatzes 2 1 ARCSEC, Sejong University, Seoul 143 747,
More informationAsteroseismology of β Cephei stars. Anne Thoul Chercheur FNRS Université de Liège, Belgium and KITP, Santa Barbara, CA
Asteroseismology of β Cephei stars Anne Thoul Chercheur FNRS Université de Liège, Belgium and KITP, Santa Barbara, CA This is an informal talk! Only β Cephei stars today Not an exhaustive review Not a
More informationAsteroseismology of the Open Clusters NGC 6791, NGC 6811, and NGC 6819 from 19 months of Kepler photometry
GREAT-ESF Workshop The World of Clusters Padova, Italy, 23-26 September 2013 Asteroseismology of the Open Clusters NGC 6791, NGC 6811, and NGC 6819 from 19 months of Kepler photometry Enrico Corsaro Postdoctoral
More informationStatus of solar and stellar modelling. Jørgen Christensen-Dalsgaard Stellar Astrophysics Centre Aarhus University
Status of solar and stellar modelling Jørgen Christensen-Dalsgaard Stellar Astrophysics Centre Aarhus University Excellent? Excellent? Probably poor! What kind of models? Model of eclipsing-binary system
More informationEnergetic properties of stellar pulsations across the Hertzsprung-Russell diagram
EPJ Web of Conferences 101, 01002 ( 2015) DOI: 10.1051/ epjconf/ 201510101002 C Owned by the authors, published by EDP Sciences, 2015 Energetic properties of stellar pulsations across the Hertzsprung-Russell
More informationThe Linear Oscillation Zoo Within Giant Stars: A Probe Of Their Deep Interiors
The Linear Oscillation Zoo Within Giant Stars: A Probe Of Their Deep Interiors Andrea Miglio School of Physics and Astronomy University of Birmingham the zoo of red giants: a unique snapshot of stellar
More informationModeling sub-giant stars. Fernando Jorge Gutiérrez Pinheiro Centro de Astrofísica da Universidade do Porto ESO Visiting Scientist
Modeling sub-giant stars Fernando Jorge Gutiérrez Pinheiro Centro de Astrofísica da Universidade do Porto ESO Visiting Scientist ESO (Santiago), 9th of April of 2008 In collaboration with: J. Fernandes
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 informationInterferometric Constraints on Fundamental Stellar Parameters
Interferometric Constraints on Fundamental Stellar Parameters Pierre Kervella LESIA, Paris Observatory photo: S. Guisard Heat Heat Transport Heat Transport Photosphere Radiation Heat Transport Photosphere
More information4 Oscillations of stars: asteroseismology
4 Oscillations of stars: asteroseismology The HR diagram below shows a whole variety of different classes of variable or pulsating/oscillating stars. The study of these various classes constitutes the
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 informationSearching for solar-like oscillations in the δ Scuti star ρ Puppis
MNRAS 435, 1563 1575 (2013) Advance Access publication 2013 August 23 doi:10.1093/mnras/stt1397 Searching for solar-like oscillations in the δ Scuti star ρ Puppis V. Antoci, 1,2,3 G. Handler, 4 F. Grundahl,
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 informationGranulation in stars. solar granulation. Thomas IAU GA Beijing, Aug Wednesday, January 2, 13
Granulation in stars Thomas Kallinger @ IAU GA Beijing, Aug 2012 solar granulation granulation in the Sun the solar signal... SOHO/NASA activity granulation pulsation the solar background... simple model
More informationObservational aspects of asteroseismology
Observational aspects of asteroseismology G. Handler Institut für Astronomie, Türkenschanzstrasse 17, 1180 Vienna, Austria Abstract: We review past and present efforts to perform asteroseismic studies
More informationKepler observations of rapidly oscillating Ap, δ Scuti and γ Doradus pulsations in Ap stars
Mon. Not. R. Astron. Soc. 4, 57 524 (2) doi:./j.365-2966.2.746.x Kepler observations of rapidly oscillating Ap, δ Scuti and γ Doradus pulsations in Ap stars L. A. Balona, M. S. Cunha, 2 D. W. Kurtz, 3
More informationAsteroseismic Study of Red Giant ɛ Ophiuchi
Research in Astron. Astrophys. 2010 Vol. XX No. XX, 000 000 http://www.raa-journal.org http://www.iop.org/journals/raa Research in Astronomy and Astrophysics Asteroseismic Study of Red Giant ɛ Ophiuchi
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 informationPulsational frequency and amplitude modulation in the δ Sct star KIC
doi:10.1093/mnras/stu1583 Pulsational frequency and amplitude modulation in the δ Sct star KIC 7106205 Dominic M. Bowman and Donald W. Kurtz Jeremiah Horrocks Institute, University of Central Lancashire,
More informationProject title: "Magnetic activities of the Sun and the stars probed by the newgeneration
JSPS Joint Project Professor Donald Kurtz Jeremiah Horrocks Institute University of Central Lancashire Project title: "Magnetic activities of the Sun and the stars probed by the newgeneration oscillation
More informationarxiv: v1 [astro-ph.sr] 9 Sep 2010
Seismic diagnostics of red giants: first comparison with stellar models J. Montalbán and A. Miglio 1 and A. Noels and R. Scuflaire arxiv:1009.1754v1 [astro-ph.sr] 9 Sep 2010 Institut d Astrophysique et
More informationarxiv: v1 [astro-ph.sr] 20 Oct 2016
On the detectability of solar-like oscillations with the NASA TESS mission arxiv:.00v [astro-ph.sr] 20 Oct 20 Tiago L. Campante,2, School of Physics and Astronomy, University of Birmingham, Edgbaston,
More informationarxiv: v1 [astro-ph.sr] 9 Jan 2014
Frequency and spectrum analysis of γ Doradus type Kepler target KIC 6462033 arxiv:1401.1964v1 [astro-ph.sr] 9 Jan 2014 C. Ulusoy a,, I. Stateva b, I. Kh. Iliev b, B. Ulaş c a College of Graduate Studies,
More informationD. Cardini, R. Ventura, G. Catanzaro, C. Barban,T. R. Bedding, J. Christensen- Dalsgaard, J. De Ridder, S. Hekker, D.Huber, T. Kallinger,A.
Maria Pia Di Mauro INAF-IASF Roma (Italy) D. Cardini, R. Ventura, G. Catanzaro, C. Barban,T. R. Bedding, J. Christensen- Dalsgaard, J. De Ridder, S. Hekker, D.Huber, T. Kallinger,A. Miglio, J. Montalban,
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 preprint version which may differ from the publisher's version. For additional information about this
More informationSUPPLEMENTARY INFORMATION
doi:10.1038/nature10389 Observations The Kepler satellite gathered 30 days of uninterrupted data for HD 187547 (KIC 7548479) between October 19 and November 18, 2009, corresponding to Kepler s observing
More informationAsteroseismology of red giant stars: The potential of dipole modes
EPJ Web of Conferences 43, 03002 (2013) DOI: 10.1051/epjconf/20134303002 C Owned by the authors, published by EDP Sciences, 2013 Asteroseismology of red giant stars: The potential of dipole modes J. Montalbán
More informationThe first evidence for multiple pulsation axes: a new rapidly oscillating Ap star in the Kepler field, KIC
Mon. Not. R. Astron. Soc. 414, 2550 2566 (2011) doi:10.1111/j.1365-2966.2011.18572.x The first evidence for multiple pulsation axes: a new rapidly oscillating Ap star in the Kepler field, KIC 10195926
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 informationTurbulence models and excitation of solar oscillation modes
Center for Turbulence Research Annual Research Briefs Turbulence models and excitation of solar oscillation modes By L. Jacoutot, A. Wray, A. G. Kosovichev AND N. N. Mansour. Motivation and objectives
More information3D atmospheric structure of the prototypical roap star HD (HR1217)
Contrib. Astron. Obs. Skalnaté Pleso 38, 335 340, (2008) 3D atmospheric structure of the prototypical roap star HD 24712 (HR1217) T. Lüftinger 1, O. Kochukhov 2, T. Ryabchikova 1,3, N. Piskunov 2, W.W.
More informationConvection in Cool Stars, as Seen through Kepler's Eyes
Convection in Cool Stars, as Seen through Kepler's Eyes Fabienne A. Bastien (Hubble Fellow, Penn State) Keivan G. Stassun (Vanderbilt), Gibor Basri (Berkeley), Jason Wright (Penn State), Joshua Pepper
More informationInterferometry & Asteroseismology of Solar-like Stars
Interferometry & Asteroseismology of Solar-like Stars (+ their Connection to Exoplanets) Daniel Huber NASA Ames Research Center Feb 11 2014 Supergiants Giants Hot Dwarfs White Dwarfs Cool Dwarfs Griffith
More informationThe domain of g Doradus variables in the Hertzsprung±Russell diagram
Mon. Not. R. Astron. Soc. 309, L19±L23 (1999) The domain of g Doradus variables in the Hertzsprung±Russell diagram South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa Accepted
More informationHelioseismology: GONG/BiSON/SoHO
Helioseismology: GONG/BiSON/SoHO Asteroseismology: Solar-like oscillations in other stars Study stars of different Masses, Ages and Chemical Composition Stellar Structure and Evolution Solar-like oscillations
More informationAsteroseismology of δ Scuti Stars: Problems and Prospects
J. Astrophys. Astr. (2005) 26, 249 259 Asteroseismology of δ Scuti Stars: Problems and Prospects M.-J. Goupil 1, M. A. Dupret 1, R. Samadi 1, T. Boehm 2, E. Alecian 1, J. C. Suarez 3, Y. Lebreton 4 & C.
More informationOscillations in g-mode period spacings in red giants as a way to determine their state of evolution
EPJ Web of Conferences 101, 01 014 ( 2015) DOI: 10.1051/ epjconf/ 201510101014 C Owned by the authors, published by EDP Sciences, 2015 Oscillations in g-mode period spacings in red giants as a way to determine
More informationAbstract. Introduction. A. Miglio, J. Montalbán, P. Eggenberger and A. Noels
Comm. in Asteroseismology Contribution to the Proceedings of the 38 th LIAC/HELAS-ESTA /BAG, 2008 Discriminating between overshooting and rotational mixing in massive stars: any help from asteroseismology?
More informationEvolution Beyond the Red Giants
Evolution Beyond the Red Giants Interior Changes Sub-giant star 1 Post-Helium Burning What happens when there is a new core of non-burning C and O? 1. The core must contract, which increases the pressure
More informationarxiv: v2 [astro-ph] 4 May 2008
SUBMITTED TO APJ Preprint typeset using L A TEX style emulateapj v. 11/12/01 THE AMPLITUDE OF SOLAR OSCILLATIONS USING STELLAR TECHNIQUES HANS KJELDSEN, 1 TIMOTHY R. BEDDING, 2 TORBEN ARENTOFT, 1 R. PAUL
More informationUnusual high-frequency oscillations in the Kepler δ Scuti star KIC
Mon. Not. R. Astron. Soc. 424, 1187 1196 (2012) doi:10.1111/j.1365-2966.2012.21295.x Unusual high-frequency oscillations in the Kepler δ Scuti star KIC 4840675 L. A. Balona, 1 M. Breger, 2 G. Catanzaro,
More informationarxiv: v1 [astro-ph.sr] 27 Jan 2010
Comm. in Asteroseismology Vol. number, publication date (will be inserted in the production process) Scaled oscillation frequencies and échelle diagrams as a tool for comparative asteroseismology arxiv:1001.5038v1
More informationarxiv: v2 [astro-ph.sr] 12 Jan 2010
Draft version August 9, 2018 Preprint typeset using L A TEX style emulateapj v. 11/10/09 HYBRID γ DORADUS δ SCUTI PULSATORS: NEW INSIGHTS INTO THE PHYSICS OF THE OSCILLATIONS FROM Kepler OBSERVATIONS arxiv:1001.0747v2
More informationarxiv:astro-ph/ v1 21 Apr 1998
A&A manuscript no. (will be inserted by hand later) Your thesaurus codes are: 06 (08.22.2; 08.15.1; 08.09.2; 03.20.8) ASTRONOMY AND ASTROPHYSICS Oscillation mode identifications and models for the δ Scuti
More informationLecture 7.1: Pulsating Stars
Lecture 7.1: Pulsating Stars Literature: KWW chapter 41!" 1 a) Classes of pulsating stars Many stars Intrinsically variable Subset: regular pulsation Type Period (d) RR Lyrae 0.3-0.9 Cepheids 1-50 W Virginis
More informationAsteroseismology of Exoplanet Host Stars
Asteroseismology of Exoplanet Host Stars Daniel Huber Institute for Astronomy, University of Hawaii Know Thy Star, Know Thy Planet October 2017 Crash Course in Asteroseismology for more details: Aerts,
More informationResults of a Search for γ Dor and δ Sct Stars with the Kepler spacecraft
Results of a Search for γ Dor and δ Sct Stars with the Kepler spacecraft P.A. Bradley XCP-6, MS F-699 Los Alamos National Laboratory, Los Alamos, NM 87545 pbradley@lanl.gov arxiv:1502.00928v1 [astro-ph.sr]
More informationThe non-detection of oscillations in Procyon by MOST: Is it really a surprise? 1 Due to an error in typesetting, the reference numbers in the text
A&A 432, L43 L48 (2005) DOI: 10.1051/0004-6361:200500019 c ESO 2005 Astronomy & Astrophysics The non-detection of oscillations in Procyon by MOST: Is it really a surprise? T. R. Bedding 1,H.Kjeldsen 2,
More informationSTEREO observations of HD90386 (RX Sex): a δ- Scuti or a hybrid star?
Journal of Physics: Conference Series PAPER OPEN ACCESS STEREO observations of HD90386 (RX Sex): a δ- Scuti or a hybrid star? To cite this article: D Ozuyar et al 2016 J. Phys.: Conf. Ser. 707 012041 View
More informationA new asteroseismic diagnostic for internal rotation in γ Doradus stars
Advance Access publication 2016 October 23 doi:10.1093/mnras/stw2717 A new asteroseismic diagnostic for internal rotation in γ Doradus stars Rhita-Maria Ouazzani, 1 S. J. A. J. Salmon, 2,3 V. Antoci, 1
More informationarxiv: v1 [astro-ph.sr] 12 Sep 2011
Mon. Not. R. Astron. Soc. 000, 1 6 (2011) Printed 4 September 2017 (MN LaT E X style file v2.2) Frequency dependence of the large frequency separation of solar-like oscillators: Influence of the Helium
More informationAsteroseismology from Line-profile variations
Asteroseismology from Line-profile variations Paul Beck Juan de la Cierva Fellow Sismologia Solar y Estelary Busquedade Exoplanetas(SSEBE) Institutode Astrofisica de Canarias, Tenerife, Spain. @BeckPaulG
More information1 Introduction 1.1 THE DIFFERENT TYPES OF PULSATORS
Introduction Asteroseismology is the study of stellar pulsations. Stellar pulsations give us a unique window into the interiors of stars and provide us with the means to probe the internal structure, physical
More informationarxiv:astro-ph/ v1 30 Aug 2002
Astronomy & Astrophysics manuscript no. October 18, 2018 (DOI: will be inserted by hand later) Solar-like oscillations in δ Scuti stars Samadi R. 1,2, Goupil M.-J. 2, and Houdek G. 3 1 Astronomy Unit,
More informationThe Solar-like Light-curve Simulator (SLS) PLATO- PSM - WP R. Samadi
The Solar-like Light-curve Simulator (SLS) PLATO- PSM - WP 126 100 R. Samadi In short Simulate stochastically-excited oscillations Include stellar granulation background, activity and white noise Applications
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 informationAsteroseismology of B stars with MESA
Anne Thoul FNRS, ULg 1 Outline What is MESA (and GYRE)? Some examples of MESA results for B stars with Pieter Degroote and «the best students» from the MESA summer school 2013 Asteroseismology of 15 CMa
More informationAsteroseismology of stars on the upper main sequence
Asteroseismology of stars on the upper main sequence Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 8, -76 Warsaw, Poland E-mail: lenz@camk.edu.pl I review the properties of pulsators
More informationarxiv: v1 [astro-ph.sr] 7 Mar 2019
MNRAS, (29) Preprint March 29 Compiled using MNRAS LATEX style file v3. A seismic scaling relation for stellar age Earl Patrick Bellinger, SAC Postdoctoral Research Fellow, Stellar Astrophysics Centre,
More informationCoversheet. Publication metadata
Coversheet This is the publisher s PDF (Version of Record) of the article. This is the final published version of the article. How to cite this publication: Rhita-Maria Ouazzani, S. J. A. J. Salmon, V.
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 informationDiffusion and helioseismology
Diffusion and helioseismology Jørgen Christensen-Dalsgaard Institut for Fysik og Astronomi, Aarhus Universitet & Danish AsteroSeismology Centre (DASC) Eddington (1926): The internal constitution of the
More informationPulsation in Herbig stars: an idea of Francesco and its realization
Mem. S.A.It. Vol. 88, 597 c SAIt 2017 Memorie della Pulsation in Herbig stars: an idea of Francesco and its realization M. Marconi and V. Ripepi Istituto Nazionale di Astrofisica Osservatorio Astronomico
More informationarxiv:astro-ph/ v1 4 Jun 2002
Astronomy & Astrophysics manuscript no. October 31, 2018 (DOI: will be inserted by hand later) The acoustic spectrum of α Cen A F. Bouchy and F. Carrier Observatoire de Genève, 51 ch. des Maillettes, 1290
More informationSTELLAR ROTATION AND MAGNETIC ACTIVITY:
STELLAR ROTATION AND MAGNETIC ACTIVITY: USING ASTEROSEISMOLOGY Rafael A. García Service d Astrophysique, CEA-Saclay, France Special thanks to: S. Mathur, K. Auguston, J. Ballot, T. Ceillier, T. Metcalfe,
More informationObservational Asteroseismology of slowly pulsating B stars
Comm. in Asteroseismology Vol. 150, 2007 Observational Asteroseismology of slowly pulsating B stars P. De Cat Koninklijke Sterrenwacht van België, Ringlaan 3, 1180 Brussels, Belgium Abstract We review
More informationTHE AMPLITUDE OF SOLAR OSCILLATIONS USING STELLAR TECHNIQUES
The Astrophysical Journal, 682:1370Y1375, 2008 August 1 # 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A. A THE AMPLITUDE OF SOLAR OSCILLATIONS USING STELLAR TECHNIQUES
More informationTransport of angular momentum within stars
Transport of angular momentum within stars Patrick Eggenberger Département d Astronomie de l Université de Genève The solar rotation profile Helioseismic measurements Garcia et al. 2007 Problem with shellular
More informationStellar Astrophysics: Stellar Pulsation
Stellar Astrophysics: Stellar Pulsation Pulsating Stars The first pulsating star observation documented was by the German pastor David Fabricius in 1596 in the constellation Cetus The star o Ceti, later
More informationStellar Astrophysics: Pulsating Stars. Stellar Pulsation
Stellar Astrophysics: Stellar Pulsation Pulsating Stars The first pulsating star observation documented was by the German pastor David Fabricius in 1596 in the constellation Cetus The star o Ceti, later
More informationWhat does helioseismology tell us about the Sun?
What does helioseismology tell us about the Sun? Jørgen Christensen-Dalsgaard Department of Physics and Astronomy, University of Aarhus & Danish AsteroSeismology Centre (DASC) Sir Arthur Stanley Eddington:
More informationTHEORETICAL ASPECTS OF ASTEROSEISMOLOGY: SMALL STEPS TOWARDS A GOLDEN FUTURE
1 THEORETICAL ASPECTS OF ASTEROSEISMOLOGY: SMALL STEPS TOWARDS A GOLDEN FUTURE Maria Pia Di Mauro INAF- Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, Italy ABSTRACT The current status
More informationPROBLEMS, CONNECTIONS AND EXPECTATIONS OF ASTEROSEISMOLOGY: A SUMMARY OF THE WORKSHOP. 1. Introduction
PROBLEMS, CONNECTIONS AND EXPECTATIONS OF ASTEROSEISMOLOGY: A SUMMARY OF THE WORKSHOP JØRGEN CHRISTENSEN-DALSGAARD Teoretisk Astrofysik Center, Danmarks Grundforskningsfond Institut for Fysik og Astronomi,
More informationarxiv: v1 [astro-ph.sr] 19 Apr 2018
Astronomy & Astrophysics manuscript no. main c ESO 28 April 23, 28 Comparing the asteroseismic properties of pulsating pre-extremely low mass white dwarf andδscuti stars Julieta P. Sánchez Arias,2, Alejandra
More informationarxiv: v2 [astro-ph.sr] 28 Aug 2018
Astronomy & Astrophysics manuscript no. main c ESO 28 August 29, 28 Comparing the asteroseismic properties of pulsating pre-extremely low mass white dwarf andδscuti stars Julieta P. Sánchez Arias,2, Alejandra
More informationStellar noise: physics and mechanisms
Stellar noise: physics and mechanisms Ignasi Ribas Institut de Ciències de l Espai (CSIC IEEC, Barcelona) Leiden, October 2012 Stellar signal: physics and mechanisms Ignasi Ribas Institut de Ciències de
More informationC. Ulusoy 1,2 and B. Ulaş3
C. Ulusoy 1,2 and B. Ulaş3 School of Aviation and Space Sciences, Girne American University University Drive, PO Box 5, 99428 Karmi Campus, Karaoglanoglu, Kyrenia, Cyprus 1, College of GraduateStudies,University
More informationOn the Red Edge of the δ Scuti Instability Strip
Chin. J. Astron. Astrophys. Vol. 2 (2002), No. 5, 441 448 ( http: /www.chjaa.org or http: /chjaa.bao.ac.cn ) Chinese Journal of Astronomy and Astrophysics On the Red Edge of the δ Scuti Instability Strip
More informationSynergies & Opportunities for SONG in the TESS Era
Synergies & Opportunities for SONG in the TESS Era Daniel Huber Institute for Astronomy, University of Hawaiʻi SONG Workshop, Tenerife October 2018 TESS Mission: Introduction & First Results Transiting
More informationThe roap phenomenon many unsolved issues
Contrib. Astron. Obs. Skalnaté Pleso 38, 301 310, (2008) The roap phenomenon many unsolved issues H. Shibahashi Department of Astronomy, University of Tokyo, Tokyo 113-0033, Japan (E-mail: shibahashi@astron.s.u-tokyo.ac.jp)
More informationPulsations and Magnetic Fields in Massive Stars. Matteo Cantiello KITP Fellow Kavli Institute for Theoretical Physics, UCSB
Pulsations and Magnetic Fields in Massive Stars Matteo Cantiello KITP Fellow Kavli Institute for Theoretical Physics, UCSB Massive stars Energy / Momentum in ISM Stellar Winds, SNe Nucleosynthesis Remnants:
More informationA unifying explanation of complex frequency spectra of γ Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves
doi:10.1093/mnras/stv868 A unifying explanation of complex frequency spectra of γ Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves Donald W. Kurtz, 1 Hiromoto Shibahashi,
More informationDetection of solar-like oscillations in the red giant star ɛ Ophiuchi by MOST spacebased photometry ABSTRACT. 0.8 )days.
A&A 468, 1033 1038 (2007) DOI: 10.1051/0004-6361:20066716 c ESO 2007 Astronomy & Astrophysics Detection of solar-like oscillations in the red giant star ɛ Ophiuchi by MOST spacebased photometry C. Barban
More informationDISSERTATION. Titel der Dissertation. Pulsation models of selected δ Scuti stars. Verfasser. Mag. rer. nat. Patrick Lenz
DISSERTATION Titel der Dissertation Pulsation models of selected δ Scuti stars Verfasser Mag. rer. nat. Patrick Lenz angestrebter akademischer Grad Doktor der Naturwissenschaften (Dr. rer. nat.) Wien,
More information