Abundances of carbon, nitrogen, and oxygen in the atmospheres of Cepheid variables: Evidence for helium enrichment

Journal Article · Fri May 01 00:00:00 EDT 1981 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/158879· OSTI ID:6338995

Luck, R E; Lambert, D L

A model-atmosphere analysis of Reticon spectra of 14 Cepheid variables and several nonvariable supergiants provides the effective temperatures, surface gravities, and abundances of carbon, nitrogen, oxygen, and metals (Z>10). The internal accuracy of the results is +- 200 K in T/sub eff/, +- 0/3 in log g, and +- 0/2 dex in the abundances.

• Research Organization: Department of Physics and Astronomy, Louisiana State University
• OSTI ID: 6338995
• Journal Information: Astrophys. J.; (United States), Vol. 245:3
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON
COSMOCHEMISTRY
CEPHEIDS
CHEMICAL COMPOSITION
STELLAR ATMOSPHERES
NITROGEN
OXYGEN
SUPERGIANT STARS
ABUNDANCE
CONVECTION
ENERGY SPECTRA
NUCLEOSYNTHESIS
ROTATION
STAR EVOLUTION
STAR MODELS
VARIABLE STARS
ATMOSPHERES
CHEMISTRY
ELEMENTS
GIANT STARS
MATHEMATICAL MODELS
MOTION
NONMETALS
PULSATING VARIABLE STARS
SPECTRA
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources