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

Abstract

As a result of the variability survey in Chi Persei and NGC6910, the number of Beta Cep stars that are members of these two open clusters is increased to twenty stars, nine in NGC6910 and eleven in Chi Persei. We compare pulsational properties, in particular the frequency spectra, of Beta 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 Chi 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 Beta Cep-type stars and maybe also for other B-type pulsators.

arXiv comment4 pages, Astronomische Nachrichten, HELAS IV Conference, Arecife, Lanzarote, Feb 2010, submitted

References in corpus (6)

• Stellar Rotation in Young Clusters. I. Evolution of Projected Rotational Velocity Distributions
• The Stellar Population of h and chi Persei: Cluster Properties, Membership, and the Intrinsic Colors and Temperatures of Stars
• B Star Rotational Velocities in h and chi Persei: A Probe of Initial Conditions During the Star-Formation Process
• UBVI and Ha Photometry of the h & chi Persei cluster
• Photometric multi-site campaign on the open cluster NGC 884 I. Detection of the variable stars
• Multiperiodicity in the newly discovered mid-late Be star V2104 Cygni

Cited by in corpus (3)

• NGC 7419 as a template for red supergiant clusters
• Ensemble asteroseismology of pulsating B-type stars in NGC 6910
• New Beta Cephei stars in the young open cluster NGC 637