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Title: Interferometry and spectroscopy of beta Cen: a beta Cephei star in a binary system
Authors: Robertson, JG ×
Bedding, TR
Aerts, Conny
Waelkens, Christoffel
Marson, RG
Barton, JR #
Issue Date: Jan-1999
Publisher: Priestley and Weale
Series Title: Monthly Notices of the Royal Astronomical Society vol:302 issue:2 pages:245-252
Abstract: beta Cen is a bright beta Cephei variable and has long been suspected to be a binary. Here we report interferometric observations with the 3.9-m Angle-Australian Telescope at a single epoch which show the star to be a binary with components separated by 15 milliarcsec and having approximately equal luminosities at 486 nm. We also present high-resolution spectra taken over five nights with the ESO CAT which show beta Cen to be a double-lined spectroscopic binary. We identify two pulsation frequencies in the primary. Further spectroscopic and interferometric studies of this double star should allow determination of its orbital parameters and component masses.
URI: 
ISSN: 0035-8711
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

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