Beta Cephei stars from ASAS: a new look at hot pulsators

Details Beta Cephei stars from ASAS: a new look at hot pulsators Beta Cephei stars from ASAS: a new look at hot pulsators

2009-12-07

arxiv.org/abs/0912.1235v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Proc. of the "Stellar Pulsation: Challenges for Theory and Observation" conference, Sanfa Fe, 31 May - 5 June 2009, 4 pages, 4

Scientific paper

The All Sky Automated Survey (ASAS) data, covering nearly 70% of the whole sky south of declination +28 deg, were recently used to discover about 300 Beta Cephei stars brighter than V~11.5 mag. As this means a nearly fourfold increase in the number of known stars of this type, new possibilities in studying these pulsators open up, including statistical work. The homogeneity of the ASAS survey allows us to study their distribution in the local Galaxy. We discuss this distribution in the context of the location of nearby spiral arms. In addition, we show pulsational (periods, amplitudes) properties of the whole sample of known Beta Cephei stars. Some objects interesting from the point of view of asteroseismology are also indicated.

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