Ref: ASTROimport-106

Multiperiodicity in the light variations of the beta Cephei star beta Crucis

Cuypers, J. ; Aerts, C. ; Buzasi, D. ; Catanzarite, J. ; Conrow, T. ; Laher, R.

published in Astronomy and Astrophysics, 392, pp. 599-603 (2002)

Abstract: High-resolution spectroscopic observations have led recently to the discovery that the beta Cephei star beta 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.

DOI: 10.1051/0004-6361:20020955
Links: link

The record appears in these collections:
Royal Observatory of Belgium > Astronomy & Astrophysics
Science Articles > Peer Reviewed Articles

 Record created 2016-07-01, last modified 2016-07-01