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The low-mass white dwarf companion to β Crateris

Citation

Burleigh, MR and Barstow, MA and Schenker, KJ and Sills, AI and Wynn, GA and Dobbie, PD and Good, SA, The low-mass white dwarf companion to β Crateris, Monthly Notices of the Royal Astronomical Society, 327, (4) pp. 1158-1164. ISSN 0035-8711 (2001) [Refereed Article]

Copyright Statement

Copyright 2001 RAS, MNRAS.

DOI: doi:10.1046/j.1365-8711.2001.04818.x

Abstract

We present FUSE H Lyman series spectroscopy of the hot white dwarf companion to the 4th magnitude A1 III star β Crt, which shows that it has an unusually low mass, MWD = 0.43 M⊙, and has almost certainly evolved through binary interaction. This system could be a long-sought remnant of Algol-type evolution, although radial velocity measurements appear to show that the pair are not close. Instead, micro-variations in the proper motion of β Crt as measured by Hipparcos suggest that the period could be as high as ∼10 yr. However, a low-mass white dwarf in a system with a period ≳3 yr is difficult to explain by conventional models for binary evolution. We speculate on alternative models for the evolution of this system which involve an eccentric binary or multiple components.

Item Details

Item Type:Refereed Article
Keywords:binaries: general; stars: individual: beta Crt; white dwarfs; ultraviolet: stars
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Stellar Astronomy and Planetary Systems
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Dobbie, PD (Dr Paul Dobbie)
ID Code:81188
Year Published:2001
Web of Science® Times Cited:4
Deposited By:Mathematics and Physics
Deposited On:2012-11-26
Last Modified:2013-06-25
Downloads:0

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