Multiperiodicity in the light variations of the β Cephei star β Crucis
Abstract
High-resolution spectroscopic observations have led recently to the discovery that the β Cephei star β Crucis (Mimosa) is multiperiodic with at least three non-radial pulsation modes. Data obtained by the star tracker of the WIRE satellite have now allowed us to confirm this multiperiodicity in the light variations. A total of 5 million observations covering 17 days was analysed and the three main periods we find in this work are in perfect agreement with the results derived from the line profile variations. The photometric 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 earlier from the line profiles. Additional periods of low-amplitude modes (between 0.2–0.3 mmag) are also derived, including one suggested earlier by the radial velocity data.
Additional Information
© 2002 ESO. Article published by EDP Sciences. Received 11 April 2002; Accepted 20 June 2002; Published online 30 August 2002. We are very grateful to all those who made this use of the WIRE satellite possible. JC is grateful for support from the Belgian Fund for Scientific Research - Flanders (G.0265.97) and DB acknowledges support from NASA (NAG5-9318).Attached Files
Published - aah3610.pdf
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Additional details
- Eprint ID
- 85157
- Resolver ID
- CaltechAUTHORS:20180307-074217472
- G.0265.97
- Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)
- NAG5-9318
- NASA
- Created
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2018-03-07Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)