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A Photometric and Spectrographic Study of SX Phœnicis

Published online by Cambridge University Press:  15 February 2018

Chulhee Kim ,
D.H. McNamara ,
Kent A. Feltz Jr.  and
C.G. Christensen
Chulhee Kim
Affiliation:
Department of Earth Science Education, Chonbuk National University, Korea
D.H. McNamara
Affiliation:
Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602
Kent A. Feltz Jr.
Affiliation:
Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602
C.G. Christensen
Affiliation:
Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602

Abstract

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New simultaneous photometric (uvbyβ) and spectrographic observations of SX Phe are described. Analysis of the light variation frequency spectrum is performed and the oscillation modes are investigated. After separating the light curves and radial velocity curve, atmospheric and physical parameters corresponding to each different oscillation mode were determined. Intrinsic (b – y), m1, and c1 values used in conjunction with a model-atmosphere grid yield a mean effective temperature < Teff > = 7590K, a mean surface gravity, < logg > = 4.02, and [Fe/H]= -0.47 for the first period. The pulsation theory and stellar model sequences yield bolometric magnitude of mass of 1.4 M⊙ and age of 2.0 Gyrs. It was found that these atmospheric parameters are almost independent upon different oscillation mode. The radial-velocity data indicates a mean radial velocity of -37km/s and a total velocity amplitude range of 38km/s.

Type
Windows on the Instability Strip
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 380 - 381
Copyright
Copyright © Cambridge University Press 1993

References

Andreasen, G.K., Hejlesen, P.M., Peterson, J.O., 1983, A&A, 121, 241 Google Scholar
Vanick, P., 1971, ApSS, 12, 10 Google Scholar
Watson, R.D., 1988, ApSS, 140, 255 Google Scholar