Spectrum analysis of the bright barium star Zeta Capricorni

Journal Article · Mon Dec 01 04:00:00 EST 1980 · Publ. Astron. Soc. Pac.; (United States)

DOI:https://doi.org/10.1086/130755· OSTI ID:5202705

Smith, V V ^[1]; Sneden, C ^[2]; Pilachowski, C A

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1. Washington University, Seattle, Wash.
2. Texas University

The spectrum of Zeta Capricorni is analyzed with the help of model atmospheres, published photometric and spectroscopic data, and newly acquired spectra of CNO features. It is found that s-process elements are enhanced by factors of up to 10, that the carbon to oxygen ratio is nearly unity, and that the carbon isotope ratio is in excess of 40. It is noted that the abundance of nitrogen does not appear to have been significantly increased in the atmosphere. The abundance results are discussed in the context of the newly discovered binary nature of Zeta Capricorni. It is noted that the model atmosphere derived confirms earlier indications that the star is one of the warmest, most luminous barium stars known.

• OSTI ID: 5202705
• Journal Information: Publ. Astron. Soc. Pac.; (United States), Journal Name: Publ. Astron. Soc. Pac.; (United States) Vol. 92; ISSN PASPA
• 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
ABSORPTION SPECTRA
ABUNDANCE
ALKALINE EARTH METALS
ATMOSPHERES
BARIUM
BINARY STARS
CARBON ISOTOPES
ELEMENTS
EMISSION SPECTRA
GIANT STARS
ISOTOPES
LUMINOSITY
MASS
METALS
NITROGEN
NONMETALS
OPTICAL PROPERTIES
OXYGEN
PHYSICAL PROPERTIES
RED GIANT STARS
SPECTRA
SPECTROPHOTOMETRY
STAR EVOLUTION
STARS
STELLAR ATMOSPHERES