Solar-like oscillations from the depths of the red-giant star KIC 4351319 observed with Kepler
- Autor(en)
- M. P. di Mauro, D. Cardini, G. Catanzaro, R. Ventura, C. Barban, T. R. Bedding, J. Christensen-Dalsgaard, J. De Ridder, S. Hekker, D. Huber, T. Kallinger, A. Miglio, J. Montalban, B. Mosser, D. Stello, K. Uytterhoeven, K. Kinemuchi, H. Kjeldsen, F. Mullally, M. Still
- Abstrakt
We present the results of the asteroseismic analysis of the red-giantstar KIC 4351319 (TYC 3124-914-1), observed for 30 d in short-cadence mode with the Kepler satellite. The analysis has allowed us to determinethe large and small frequency separations, ∆ν0 = 24.6 ± 0.2 μHz and δν02 = 2.2 ± 0.3 μHz, respectively,and the frequency of maximum oscillation power, νmax = 386.5 ± 4.0 μHz.The high signal-to-noise ratio of the observations allowed us toidentify 25 independent pulsation modes whose frequencies range approximately from 300 to 500 μHz.The observed oscillation frequencies together with the accurate determination of the atmospheric parameters (effective temperature,gravity and metallicity), provided by additional ground-based spectroscopic observations, enabled us to theoretically interpret the observed oscillation spectrum.KIC 4351319 appears to oscillate with a well-defined solar-type p-modepattern due to radial acoustic modes and non-radial nearly pure p modes.In addition, several non-radial mixed modes have been identified.Theoretical models well reproduce the observed oscillation frequenciesand indicate that this star, located at the base of the ascendingred-giant branch, is in the hydrogen-shell-burning phase, with a mass of ~1.3 M⊙, a radius of ~3.4 R⊙ and an age of ~5.6 Gyr. The main parameters of this star have been determined with an unprecedented level of precision for a red-giant star, with uncertainties of 2 per cent for mass, 7 per cent for age, 1 per cent forradius and 4 per cent for luminosity.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- INAF IASF Roma, INAF-Osservatorio Astrofisico di Catania, Université de recherche Paris Sciences et Lettres, The University of Sydney, Aarhus University, Katholieke Universiteit Leuven, University of Birmingham, University of Amsterdam (UvA), University of British Columbia (UBC), Université de Liège, Université Paris VII - Paris-Diderot, Kiepenheuer-Institut für Sonnenphysik (KIS), National Aeronautics & Space Administration (NASA)
- Journal
- Monthly Notices of the Royal Astronomical Society
- Band
- 415
- Seiten
- 3783-3797
- ISSN
- 0035-8711
- DOI
- https://doi.org/10.1111/j.1365-2966.2011.18996.x
- Publikationsdatum
- 08-2011
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103004 Astrophysik
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/16f60c2b-04ef-4d7a-a3b7-d7aec8b7bf6c