Theoretical model of red variables in globular clusters

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169144· OSTI ID:6317091

Perl, M; Tuchman, Y ^[1]

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1. Jerusalem Hebrew Univ. (Israel)

The common procedure of using the pulsation constant as a tool for the determination of the dominant mode of pulsation in Mira variables is shown to include a large uncertainty. An alternative way based on theoretical mapping of a luminosity-period relation, which is compared with the well-determined observations of these parameters, is presented. It is shown that the peculiar features of the observed distribution of Miras variables in the period-luminosity plane, for Tuc 47, are distinct enough to enable a clear and a definite selection of the dominant mode in these variables - the second overtone for red semiregulars and the first overtone for Miras variables. These results are also confirmed by detailed nonlinear calculations, some of which are presented as well. 27 refs.

• OSTI ID: 6317091
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 360; 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
GIANT STARS
LUMINOSITY
MATHEMATICAL MODELS
NONLINEAR PROBLEMS
OPTICAL PROPERTIES
OSCILLATIONS
PHYSICAL PROPERTIES
RED GIANT STARS
STAR CLUSTERS
STAR MODELS
STARS
VARIABLE STARS