Pulsating stars in the ASAS-3 database. I. Beta Cephei stars
Abstract
We present results of an analysis of the ASAS-3 data for short-period variables from the recently published catalogue of over 38 000 stars. Using the data available in the literature we verify the results of the automatic classification related to Cephei pulsators. In particular, we find that 14 stars in the catalogue can be classified unambiguously as new Cephei stars. By means of periodogram analysis we derive the frequencies and amplitudes of the excited modes. The main modes in the new Cephei stars have large semi-amplitudes, between 35 and 80 mmag. Up to four modes were found in some stars. Two (maybe three) new Cephei stars are members of southern young open clusters: ASAS 164409-4719.1 belongs to NGC 6200, ASAS 164630-4701.2 is a member of Hogg 22, and ASAS 164939-4431.7 could be a member of NGC 6216. We also analyze the photometry of four known Cephei stars in the ASAS-3 catalogue, namely IL Vel, NSV 24078, V1449 Aql and SY Equ. Finally, we discuss the distribution of Cephei stars in the Galaxy.
Cite
@article{arxiv.astro-ph/0506297,
title = {Pulsating stars in the ASAS-3 database. I. Beta Cephei stars},
author = {A. Pigulski},
journal= {arXiv preprint arXiv:astro-ph/0506297},
year = {2007}
}
Comments
15 pages, 8 figures, accepted for publication in Acta Astronomica