The OmegaWhite survey for short-period variable stars - VI. Open clusters
Abstract
Using light curves with ~3 min cadence and a duration of 2 h made using the OmegaWhite survey, we present the results of a search for short-period variable stars in the field of 20 open clusters. We identified 92 variable stars in these fields. Using a range of cluster member catalogues and Gaia EDR3 data, we have determined that 10 are cluster members and 2 more are probable members. Based on their position on the Gaia HRD and their photometric periods, we find that most of these are δ Sct stars. We obtained low-resolution optical spectroscopy of some of these cluster members and field stars. We discuss the cluster variable stars in the context of δ Sct stars in other open clusters.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- June 2022
- DOI:
- 10.1093/mnras/stac802
- arXiv:
- arXiv:2203.11533
- Bibcode:
- 2022MNRAS.513..468T
- Keywords:
-
- stars: distances;
- stars: oscillations;
- stars: variables: δ Scuti;
- (Galaxy:) open clusters and associations: general;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Accepted for publication in MNRAS. 20 pages, 14 figures