Cepheids in Magellanic Cloud star clusters - Fundamental and overtone pulsators in NGC 2157
Journal Article
·
· Astrophysical Journal; (USA)
- Mount Wilson and Las Campanas Observatories, Pasadena, CA (USA) Steward Observatory, Tucson, AZ (USA) JPL, Pasadena, CA (USA)
CCD survey data are employed to examine Cepheids in young Magellanic Cloud star clusters. The properties of three Cepheids observed in NGC 2157 are described. It is detected that the two short-period (3 days) Cepheids have photometric properties that correspond to overtone pulsators and the long-period (7.7 days) Cepheid pulses in the fundamental mode. The pulsational masses for the three Cepheids are calculated to be about 5 solar masses. This mass value does not correlate with the average pulsational mass for Cepheids of 3.0 + or - 0.4 solar masses. The potential cause of this deviation in evolutionary/pulsational mass is investigated. 23 refs.
- OSTI ID:
- 6865589
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 353; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CEPHEIDS
CHARGE-COUPLED DEVICES
GALAXIES
MAGELLANIC CLOUDS
MASS
MATHEMATICAL MODELS
OSCILLATIONS
PHOTOMETRY
PULSATING VARIABLE STARS
PULSES
SEMICONDUCTOR DEVICES
STAR CLUSTERS
STARS
VARIABLE STARS
VARIATIONS
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CEPHEIDS
CHARGE-COUPLED DEVICES
GALAXIES
MAGELLANIC CLOUDS
MASS
MATHEMATICAL MODELS
OSCILLATIONS
PHOTOMETRY
PULSATING VARIABLE STARS
PULSES
SEMICONDUCTOR DEVICES
STAR CLUSTERS
STARS
VARIABLE STARS
VARIATIONS