Open AccessLuminosity variation in the extended one-zone RR Lyrae model
Author(s) -
D. Pricopi
Publication year - 2005
Publication title -
serbian astronomical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.196
H-Index - 16
eISSN - 1820-9289
pISSN - 1450-698X
DOI - 10.2298/saj0570057p
Subject(s) - physics , rr lyrae variable , luminosity , astrophysics , light curve , stellar pulsation , stars , variable star , rotation (mathematics) , variation (astronomy) , star (game theory) , nonlinear system , radiation zone , convection zone , geometry , globular cluster , quantum mechanics , galaxy , mathematics
The Stellingwerf one-zone stellar model is extended by assuming, a slow and uniform rotation that leads to a very small oblateness of the star. The matter in the core-surrounding shell is supposed to consists of a mixture of ideal gas and radiation. This one-zone stellar pulsation model is proposed as a tool to investigate the factors affecting luminosity variations of pulsating stars. Linear and nonlinear analyses of the resulting equations are described. The results are in very good agreement with the observed RR Lyrae light curves.
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