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Title:
A photometric and spectrographic study of SX Phoenicis
Authors:
Kim, Chulhee; McNamara, D. H.; Christensen, C. G.
Affiliation:
AA(Chonbulk National Univ., Korea), AB(Chonbulk National Univ., Korea), AC(Brigham Young Univ., Provo, UT, US)
Publication:
The Astronomical Journal (ISSN 0004-6256), vol. 106, no. 6, p. 2493-2501 (AJ Homepage)
Publication Date:
12/1993
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOMETRY, ASTRONOMICAL SPECTROSCOPY, SPECTRUM ANALYSIS, STELLAR SPECTRA, VARIABLE STARS, HARMONICS, STELLAR ATMOSPHERES, STELLAR EVOLUTION, STELLAR LUMINOSITY, STELLAR MASS, VELOCITY
DOI:
10.1086/116817
Bibliographic Code:
1993AJ....106.2493K

Abstract

Simultaneous photometric and spectrographic observations of SX Phe are described. Analysis of the light and velocity frequency spectra are performed. It is shown that all frequencies detected are harmonics or combinations of the fundamental and first harmonic frequencies. Intrinsic (b-y) and c1 values used in conjunction with a model-atmosphere grid appropriate for a star with (M/H) = 1.0 yields the mean value of (Teff) = 7630 K and the mean value of (log g) = 3.90. Standard evolutionary models indicate the mass is 1.13 solar mass and the mean value of (Mupsilon) value is +2.9. The radial-velocity data indicate a mean radial velocity of -37 km/s and a total range of 38 km/s.

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