On nonadiabatic waves in the photospheres of cool stars

Details On nonadiabatic waves in the photospheres of cool stars On nonadiabatic waves in the photospheres of cool stars

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002an....323..465p&link_type=abstract

Astronomische Nachrichten, vol. 323, no. 5, p. 465-474

Astronomy and Astrophysics

Astronomy

1

Stars: Atmospheres, Stars: Oscillations, Stars: Late-Type, Methods: Analytical, Physical Processes

Scientific paper

The coupled set of equations of hydrodynamics and radiative transfer is derived for small disturbances in a plane, grey atmosphere. Only radiative transfer is taken into account in the energy equation; dynamical effects of radiation are ignored. A mean stationary radiative flux through the photosphere is taken into account. The radiative transfer equation is used by assuming the Eddington approximation, moreover, an exponential height profile of the temperature and an analytical opacity formula are supposed. For this model we obtained an asymptotic solution for plane nonadiabatic acoustic waves and radiation waves. The approach provides a detailed discussion of the interaction of nonadiabatic p-modes and radiation waves in a realistic model of the photosphere of a solar-like star.

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