A photometric and spectrographic study of BP Pegasi

Details A photometric and spectrographic study of BP Pegasi A photometric and spectrographic study of BP Pegasi

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101.1009k&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Nov. 1989, p. 1009-1016. Research supported by Bri

Astronomy and Astrophysics

Astronomy

5

Cepheid Variables, Dwarf Stars, Radial Velocity, Stellar Spectra, Stellar Spectrophotometry, Stellar Mass, Stellar Temperature

Scientific paper

Photometric (uvby beta) and spectrographic observations of the dwarf Cepheid BP Peg are discussed. The observations are used to derive a reddening value of E(b-y) = 0.067 m. An effective temperature of 7470 K, a mean surface gravity, log g = 3.85, and a Fe/H abundance ratio of - 0.08 are obtained. Pulsation theory and stellar model sequences yield M(bol) = 1.4 m, mass = 1.85 solar masses, and age = 1.3 X 10 to the 9th yrs. Also, the radial-velocity data show a mean radial velocity of - 30 km/s and a total velocity range of 36 km/s.

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