Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007coast.150..193h&link_type=abstract
Communications in Astroseismology, Vol. 150, p.193
Astronomy and Astrophysics
Astronomy
8
Scientific paper
We carried out an extensive CCD photometry campaign of the open cluster NGC 3293 that contains eleven known β Cephei stars. Preliminary results indicate that none of these is singly periodic. Several objects are among the most multiperiodic of these massive pulsators, giving us strong hope to perform precision asteroseismology in an open cluster for the first time. We also report a peculiar group of variables in NGC 3293 that is located near the low-luminosity end of the β Cephei instability strip. The variability periods of these stars are too long for classical β Cephei pulsation, but too short for binarity or rotational effects, or for SPB-type pulsation. In addition, we discovered about a dozen δ Scuti stars in the field.
Aerts Christine
Desmet Maarten
Handler Gerald
Kanaan Antonio
Lorenz Dieter
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