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Photometric and Spectroscopic Variability of the Hydrogen-Deficient Binary CPD-58°2721

Published online by Cambridge University Press:  12 April 2016

K. Morrison ,
J.S. Drilling ,
U. Heber ,
P.W. Hill  and
C.S. Jeffery
K. Morrison
Affiliation:
University Observatory, Buchanan Gardens, St Andrews, Fife KY16 9LZ, Scotland.
J.S. Drilling
Affiliation:
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803-4001, U.S.A.
U. Heber
Affiliation:
Institut für Theoretische PhysikundSternwarte der Universität, Olshausenstrasse 40, D-2300 Kiel, Federal Republic of Germany.
P.W. Hill
Affiliation:
University Observatory, Buchanan Gardens, St Andrews, Fife KY16 9LZ, Scotland.
C.S. Jeffery
Affiliation:
University Observatory, Buchanan Gardens, St Andrews, Fife KY16 9LZ, Scotland.

Abstract

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The hydrogen-deficient star CPD-58°2721 (=LSS1922) has been observed to show radial velocity variations with a range of 140 km s−1. It shows light and colour variations with amplitudes of 0T07 on a timescale of about 9 days. The absorption spectrum is nitrogen-rich and is seen to vary on a short timescale (4 days). CPD-58°2721 therefore appears to be a hydrogen-deficient binary similar to KS Per and v sgr. The photometric variability is attributed to radial pulsation.

Type
V Hydrogen Deficient Binaries
Information
International Astronomical Union Colloquium , Volume 87: Hydrogen Deficient Stars and Related Objects , 1985 , pp. 245 - 250
Copyright
Copyright © Reidel 1986

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