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A Flower on a WIRE: Asteroseismology of a Massive Star

Published online by Cambridge University Press:  12 April 2016

J. Cuypers ,
C. Aerts ,
D. Buzasi ,
J. Catanzarite ,
T. Conrow  and
R. Laher
J. Cuypers
Affiliation:
Koninklijke Sterrenwacht van België, Ringlaan 3, B-1180 Brussel, Belgium
C. Aerts
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200B, B-3030 Heverlee, Belgium
D. Buzasi
Affiliation:
Department of Physics, US Air Force Academy, Colorado Springs, CO 80840, USA
J. Catanzarite
Affiliation:
Infrared Processing and Analysis Center, Mailstop 100-22, California Institute of Technology, Pasadena, CA 91125, U.S.A.
T. Conrow
Affiliation:
Infrared Processing and Analysis Center, Mailstop 100-22, California Institute of Technology, Pasadena, CA 91125, U.S.A.
R. Laher
Affiliation:
SIRTF Science Center, Mailstop 314-6, California Institute of Technology, Pasadena, CA 91125, U.S.A

Abstract

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Recently it became clear from a line profile study that the β Cephei star β Crucis (Mimosa) is multiperiodic with at least three modes excited. Observations of this star by the star tracker of the WIRE satellite have now confirmed the multiperiodicity in the light variations. A total of 5 million observations covering 17 days was analysed and the three main periods are in perfect agreement with the line profile results. The amplitudes are small (3, 2.7 and 0.6 millimag for the dominant modes), but this is not surprising in view of the mode identifications derived from the line profiles. More periods could still be present, including the one earlier suggested by the radial velocity data.

Type
Part 6. Asteroseismology from Space and from the Ground
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 620 - 623
Copyright
Copyright © Astronomical Society of the Pacific 2002

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