Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..246c&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, April 1983, p. 246-251.
Astronomy and Astrophysics
Astronomy
20
Abundance, Radial Velocity, Stellar Gravitation, Stellar Spectrophotometry, Variable Stars, A Stars, Atmospheric Models, B Stars, Stellar Atmospheres, Stellar Color, Stellar Temperature
Scientific paper
VY Serpentis is one of the brighter field RR Lyrae variable stars of type ab. A high-dispersion spectrogram of VY Ser has been obtained and analyzed. The present investigation has the objective to estimate the metallicity and gravity of the star for use in an analysis. Estimates of both metallicity and gravity may be obtained by photometric means, but corroborating data are always desirable. The results will be used to convert photometric colors to temperatures and bolometric corrections. Attention is given to observations, reddening, model atmosphere calculations, line data, microturbulence and gravity. Photometric gravities and derived elemental abundances are presented in tables. It is found that VY Ser is a metal-poor star. It is a very cool variable, near the red edge of the instability strip, which may explain its large microturbulent velocity of 4.2 km/sec.
Carney Bruce W.
Jones Rebecca
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