Nonradial, nonadiabatic stellar pulsations

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169333· OSTI ID:6316194

Pesnell, W D ^[1]

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1. Los Alamos National Lab., NM (USA)

This paper describes how nonradial stellar pulsations can be modeled using a Lagrangian formulation. The adiabatic eigenvalues of this operator are compared to previously published results, using simple stellar models to show the equivalence of this method and other techniques. Nonadiabatic effects are included by appending the thermal equation to the adiabatic operator. At this point, it becomes necessary to include variations in the convective energy transport. Several ways of doing this by freezing the convection are examined. 35 refs.

• OSTI ID: 6316194
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 363; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADIABATIC PROCESSES
ASTROPHYSICS
COMPARATIVE EVALUATIONS
CONVECTION
EIGENVALUES
ENERGY TRANSFER
FUNCTIONS
HEAT TRANSFER
LAGRANGIAN FUNCTION
MASS TRANSFER
MATHEMATICAL MODELS
OSCILLATIONS
STAR MODELS
STARS
VARIATIONS