Title

Towards ensemble asteroseismology of the young open clusters χ Persei and NGC 6910

Abstract

As a result of the variability survey in χ Persei and NGC 6910, the number of β Cep stars that are members of these two open clusters is increased to twenty stars, nine in NGC 6910 and eleven in χ Persei. We compare pulsational properties, in particular the frequency spectra, of β Cep stars in both clusters and explain the differences in terms of the global parameters of the clusters. We also indicate that the more complicated pattern of the variability among B-type stars in χ Persei is very likely caused by higher rotational velocities of stars in this cluster. We conclude that the sample of pulsating stars in the two open clusters constitutes a very good starting point for the ensemble asteroseismology of β Cep-type stars and maybe also for other B-type pulsators.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1002/asna.201011462

Keywords

Open clusters and associations: individual (χ Per, NGC 6910), Stars: oscillations, Techniques: photometric

Publication Date

12-1-2010

Journal Title

Astronomische Nachrichten

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