The nature of dwarf cepheids. II - VX Hydrae

Details The nature of dwarf cepheids. II - VX Hydrae The nature of dwarf cepheids. II - VX Hydrae

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977pasp...89...55b&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 89, Feb.-Mar. 1977, p. 55-60.

Astronomy and Astrophysics

Astronomy

45

Atmospheric Composition, Cepheid Variables, Dwarf Stars, Stellar Models, Abundance, Atmospheric Models, Metals, Stellar Spectrophotometry, Stellar Temperature, Surface Temperature

Scientific paper

The variability of the dwarf cepheid VX Hya has been investigated during three nights using the uvby and beta filters. An average effective surface gravity of log g = 3.47 and an average surface temperature of 7000 K were found. The mean metallicity index of +0.003 magnitude indicates solar-type abundances. No evidence for a low-mass nature of this star is found from the metal abundance, period-gravity relation, and space motion. It is suggested that VX Hya is a large-amplitude delta Scuti star. Model-atmosphere calibrations of the uvby-beta indices using Kurucz's (1975) models and Breger's (1974) normalization are given.

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