Premium
What does the Sun suggest about global oscillation amplitudes in solar‐like stars
Author(s) -
Severino G.,
Straus Th.,
Oliviero M.,
Steffen M.
Publication year - 2010
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201011421
Subject(s) - physics , stars , amplitude , adiabatic process , astrophysics , oscillation (cell signaling) , scaling , luminosity , star (game theory) , astronomy , optics , thermodynamics , geometry , mathematics , galaxy , biology , genetics
Motivated by the results of CoRoT and based on the solar experience, we develop a new stellar scaling law for the intensity‐velocity amplitude ratio (gain) of resonant oscillations, which is a quantity independent of the excitation model. The comparison of our approach with observations gives new interesting results for the Sun as a star. Moreover, for a sample of three solar‐like stars observed by CoRoT, we found that our scaling law provides an explanation of the low observed luminosity amplitudes which is an alternative to non‐adiabatic effects (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)