Towards ensemble asteroseismology of the young open clusters χ Persei and NGC 6910
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.
Physics, Astronomy, and Materials Science
Open clusters and associations: individual (χ Per, NGC 6910), Stars: oscillations, Techniques: photometric
Saesen, S., A. Pigulski, F. Carrier, G. Michalska, C. Aerts, J. De Ridder, Maryline Briquet et al. "Towards ensemble asteroseismology of the young open clusters χ Persei and NGC 6910." Astronomische Nachrichten 331, no. 9‐10 (2010): 1080-1083.