Amplitudes and lifetimes of solar-like oscillations observed by CoRoT. Red-giant versus main-sequence stars

[en] Context. The advent of space-borne missions such as CoRoT or Kepler providing photometric data has brought new possibilities for asteroseismology across the H-R diagram. Solar-like oscillations are now observed in many stars, including red giants and main-sequence stars. Aims: Based on several hundred identified pulsating red giants, we aim to characterize their oscillation amplitudes and widths. These observables are compared with those of main-sequence stars in order to test trends and scaling laws for these parameters for main-sequence stars and red giants. Methods: An automated fitting procedure is used to analyze several hundred Fourier spectra. For each star, a modeled spectrum is fitted to the observed oscillation spectrum, and mode parameters are derived. Results: Amplitudes and widths of red-giant solar-like oscillations are estimated for several hundred modes of oscillation. Amplitudes are relatively high (several hundred ppm) and widths relatively small (very few tenths of a μHz). Conclusions: Widths measured in main-sequence stars show a different variation with the effective temperature from red giants. A single scaling law is derived for mode amplitudes of red giants and main-sequence stars versus their luminosity to mass ratio. However, our results suggest that two regimes may also be compatible with the observations.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Baudin, F.; Institut d'Astrophysique Spatiale, CNRS, Université Paris XI, 91405, Orsay Cedex, France

Barban, C.; LESIA, Université Pierre et Marie Curie, Université Denis Diderot, Obs. de Paris, 92195, Meudon Cedex, France

Belkacem, K.; Institut d'Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 17, 4000, Liège, Belgium ; LESIA, Université Pierre et Marie Curie, Université Denis Diderot, Obs. de Paris, 92195, Meudon Cedex, France

Hekker, S.; Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium ; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK ; Astronomical Institute "Anton Pannekoek", University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands

Morel, Thierry ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)

Samadi, R.; LESIA, Université Pierre et Marie Curie, Université Denis Diderot, Obs. de Paris, 92195, Meudon Cedex, France

Benomar, O.; Institut d'Astrophysique Spatiale, CNRS, Université Paris XI, 91405, Orsay Cedex, France

Goupil, M*-J; LESIA, Université Pierre et Marie Curie, Université Denis Diderot, Obs. de Paris, 92195, Meudon Cedex, France

Carrier, F.; Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium

Ballot, J.; Institut de Recherche en Astrophysique et Planétologie, CNRS, Université de Toulouse, 31400, Toulouse, France

More authors (5 more)

Language :

English

Title :

Amplitudes and lifetimes of solar-like oscillations observed by CoRoT. Red-giant versus main-sequence stars

Publication date :

2011

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Volume :

529

Pages :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2011A%26A...535C...1B
https://dx.doi.org/10.1051/0004-6361/201014037e

Available on ORBi :

since 17 January 2012

Statistics

Number of views

52 (0 by ULiège)

Number of downloads

66 (0 by ULiège)

More statistics

Scopus citations^®

Scopus citations^®
without self-citations

OpenCitations

Bibliography

Alonso, A., Arribas, S., & Martinez-Roger, C. 1998, A&AS, 131, 209
Alonso, A., Arribas, S., & Martínez-Roger, C. 1999, A&AS, 140, 261
Appourchaux, T., Michel, E., Auvergne, M., et al. 2008, A&A, 488, 705
Arenou, F., Grenon, M., & Gomez, A. 1992, A&A, 258, 104
Auvergne, M., Bodin, P., Boisnard, L., et al. 2009, A&A, 506, 411
Balmforth, N. J. 1992, MNRAS, 255, 639
Barban, C., Matthews, J. M., de Ridder, J., et al. 2007, A&A, 468, 1033
Barban, C., Deheuvels, S., Baudin, F., et al. 2009, A&A, 506, 51
Baudin, F., Samadi, R., Goupil, M.-J., et al. 2005, A&A, 433, 349
Bedding, T. R., Huber, D., Stello, D., et al. 2010, ApJ, 713, L176
Belkacem, K., Samadi, R., Goupil, M. J., Kupka, F., & Baudin, F. 2006, A&A, 460, 183
Benomar, O., Baudin, F., Campante, T., et al. 2009, A&A, 507, L13
Carpenter, J. M. 2001, AJ, 121, 2851
Carrier, F., de Ridder, J., Baudin, F., et al. 2010, A&A, 509, A73
Chaplin, W. J., Houdek, G., Elsworth, Y., et al. 2005, MNRAS, 360, 859
Chaplin, W. J., Houdek, G., Appourchaux, T., et al. 2008, A&A, 485, 813
Chaplin, W. J., Houdek, G., Karoff, C., Elsworth, Y., & New, R. 2009, A&A, 500, L21
De Ridder, J., Barban, C., Baudin, F., et al. 2009, Nature, 459, 398
Deheuvels, S., & Michel, E. 2010, Ap&SS, 328, 259
Deheuvels, S., Bruntt, H., Michel, E., et al. 2010, A&A, 515, A87
Deleuil, M., Meunier, J. C., Moutou, C., et al. 2009, AJ, 138, 649
Dobashi, K., Uehara, H., Kandori, R., et al. 2005, PASJ, 57, 1
Dupret, M. A., Barban, C., Goupil, M.-J., et al. 2006, in Proceedings of SOHO 18/GONG 2006/HELAS I, Beyond the spherical Sun, ESA SP, 624
Dupret, M., Belkacem, K., Samadi, R., et al. 2009, A&A, 506, 57
Fiorucci, M., & Munari, U. 2003, A&A, 401, 781
Frandsen, S., Carrier, F., Aerts, C., et al. 2002, A&A, 394, L5
Frohlich, C., Andersen, B. N., Appourchaux, T., et al. 1997, Sol. Phys., 170, 1
Goldreich, P., & Kumar, P. 1991, ApJ, 374, 366
Gough, D. 1980, in Lecture Notes in Physics, Berlin Springer Verlag, Nonradial and Nonlinear Stellar Pulsation, ed. H. A. Hill & W. A. Dziembowski, 125, 273
Hekker, S., Kallinger, T., Baudin, F., et al. 2009, A&A, 506, 465
Hekker, S., Barban, C., Baudin, F., et al. 2010, A&A, 520, A60
Houdek, G., & Gough, D. O. 2002, MNRAS, 336, L65
Houdek, G., Balmforth, N. J., Christensen-Dalsgaard, J., & Gough, D. O. 1999, A&A, 351, 582
Huber, D., Bedding, T. R., Stello, D., et al. 2010, ApJ, 723, 1607
Kallinger, T., Mosser, B., Hekker, S., et al. 2010a, A&A, 522, A1
Kallinger, T., Weiss, W. W., Barban, C., et al. 2010b, A&A, 509, A77
Kjeldsen, H., & Bedding, T. R. 1995, A&A, 293, 87
Marshall, D. J., Robin, A. C., Reylé, C., Schultheis, M., & Picaud, S. 2006, A&A, 453, 635
Michel, E., Baglin, A., Auvergne, M., et al. 2008, Science, 322, 558
Michel, E., Samadi, R., Baudin, F., et al. 2009, A&A, 495, 979
Miglio, A., Montalb́n, J., Baudin, F., et al. 2009, A&A, 503, L21
Mosser, B., Belkacem, K., Goupil, M., et al. 2010, A&A, 517, A22
Rowles, J., & Froebrich, D. 2009, MNRAS, 395, 1640
Samadi, R., Georgobiani, D., Trampedach, R., et al. 2007, A&A, 463, 297
Samadi, R., Ludwig, H.-G., Belkacem, K., et al. 2010, A&A, 509, A15
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525
Soriano, M., Vauclair, S., Vauclair, G., & Laymand, M. 2007, A&A, 471, 885
Stein, R. F., & Nordlund, Å. 2001, ApJ, 546, 585
Stello, D., Chaplin, W. J., Basu, S., Elsworth, Y., & Bedding, T. R. 2009, MNRAS, 400, L80
Tarrant, N. J., Chaplin, W. J., Elsworth, Y., Spreckley, S. A., & Stevens, I. R. 2007, MNRAS, 382, L48
Toutain, T., & Fröhlich, C. 1992, A&A, 257, 287
Valenti, J. A., & Fischer, D. A. 2005, ApJS, 159, 141
Zechmeister, M., Reffert, S., Hatzes, A. P., Endl, M., & Quirrenbach, A. 2008, A&A, 491, 531