Interpretation of the solar-like pulsational behaviour of η Bootis |
| |
| Authors: | Maria Pia Di Mauro JØrgen Christensen-Dalsgaard Lucio Paternò Francesca D'Antona |
| |
| Institution: | (1) INAF-Osservatorio Astrofisico di Catania, Via S. Sofia 78, I-95123 Catania, Italy;(2) Teoretisk Astrofysik Center, Danmarks Grundforskningsfond and Institut for Fysik og Astronomi, Aarhus Universitet, Ny Munkegade bygn. 520, DK-8000 Aarhus C, Denmark;(3) Dipartimento di Fisica e Astronomia dell'Università di Catania, Via S. Sofia 78, I-95123 Catania, Italy;(4) INAF-Osservatorio Astronomico di Roma, Via di Frascati 33, I-00040 Monte Porzio Catone (RM), Italy |
| |
| Abstract: | HR 5235, better known as η Bootis, is a bright and well-known star for which very accurate observations have recently enabled
Kjeldsen et al. (2003) and Carrier, Bouchy, and Eggenberger (2003) not only to confirm the presence of solar-like oscillations, but also
to identify the excitation in the oscillation spectrum of several p-mode frequencies with harmonic degrees l = 0 – 2. Here we show how such observational success, through the calculation and the investigation of theoretical structure
models and the comparison of the observed oscillation spectra with the predicted p-mode frequencies of oscillations, permits one to draw conclusions about the actual evolutionary state of this star and on
the physical properties of its internal structure. The computation of the structure models is based on the use of updated
global parameters and includes overshooting from the convective core. In particular, we consider the effect on the stellar
structure, and hence on the theoretical frequencies, of employing different equations of state and different formalisms to
describe the convective energy transport. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
