Pulsating variables in NGC 3293, the open cluster with the most ? Cephei stars known

Autor(en)

Gerald Handler, Taavi Tuvikene, Denise Lorenz

Abstrakt

We carried out an extensive CCD photometry campaign of the open cluster NGC 3293 that contains eleven known ? 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 ? Cephei instability strip. The variability periods of these stars are too long for classical ? Cephei pulsation, but too short for binarity or rotational effects, or for SPB-type pulsation. In addition, we discovered about a dozen ? Scuti stars in the field.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Vrije Universiteit Brussel

Journal

Communications in Asteroseismology

Band

150

ISSN

1021-2043

DOI

https://doi.org/10.1553/cia150s193

Publikationsdatum

2007

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/2ec399c2-3f40-42b3-b2b2-c116eb2ffb2d