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Title: A spectroscopic analysis of the beta-cephei-star-alpha-lupi
Authors: Mathias, P ×
Aerts, Conny
Depauw, M
Gillet, D
Waelkens, Christoffel #
Issue Date: Mar-1994
Publisher: EDP Sciences
Series Title: Astronomy & Astrophysics vol:283 issue:3 pages:813-826
Abstract: We present high spectral and time resolution observations of high signal-to-noise ratio (above 200) of the beta Cephei star alpha Lupi, carried out for three different wavelengths during three nights. The radial velocity curves show a nice sinusoidal behaviour for all elements. However, the amplitude and the average velocity of the variation depend on the considered lines. By means of a simple least squares fit conducted on each observed night, we also point out a non-constancy of the pulsation period. A comparison between the RI and FWHM curves seems to indicate that temperature effects are present during the pulsation, while the EW varies by about 3%. The radius variation and acceleration curves have a small amplitude, indicating that the motion does not have any strong non-linear behaviour.
URI: 
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

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