Classical Cepheids with RV Tauri characteristics

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169562· OSTI ID:5995423

Moskalik, P; Buchler, J R ^[1]

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1. Florida Univ., Gainesville (USA)

The nonlinear pulsational behavior of Population I Cepheid models with masses between 8 and 13 solar masses is studied. Narrow windows are found in the model sequences in which the pulsations exhibit periodic alterations of deep and shallow minima in the light of radial velocity curves. These RV Tau characteristics are caused by a 3:2 resonance between the fundamental mode and the first overtone. If accurate observations of long period (about 25-40 days) Cepheids should confirm such a behavior this would put a constraint on the theoretical models as does the 2:1 resonance and the concomitant Hertzsprung progression. 32 refs.

• OSTI ID: 5995423
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 366; 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
CEPHEIDS
DIAGRAMS
HERTZSPRUNG-RUSSELL DIAGRAM
MASS
MATHEMATICAL MODELS
NONLINEAR PROBLEMS
OSCILLATIONS
PULSATING VARIABLE STARS
RADIAL VELOCITY
STAR MODELS
STARS
VARIABLE STARS
VELOCITY