Study of classical Be stars in open clusters older than 100 Myr
Abstract
We performed the slitless spectroscopic survey to identify classical Be (CBe) stars in open clusters older than 100 Myr. Observing a sample of 71 open clusters, we identified 13 CBe stars in 11 open clusters, one of, which (TYC 2679-432-1) is a new detection. The 13 CBe stars show both Hα in emission and IR excess, which confirm that they possess gaseous circumstellar discs. Two more CBe stars are found to exhibit Hα in absorption for the first time, indicating that might be passing through disc-less episode presently. The spectral-type estimation is done for all these 15 stars and it is noticed that they belong to B0.5-B8 type. Moreover, we found that the distribution of our sample is peaking near late B-types as expected.
- Publication:
-
Journal of Astrophysics and Astronomy
- Pub Date:
- October 2021
- DOI:
- 10.1007/s12036-021-09780-w
- arXiv:
- arXiv:2204.00248
- Bibcode:
- 2021JApA...42..109J
- Keywords:
-
- Classical Be stars;
- slitless spectroscopy;
- spectral type;
- color-color diagram;
- open clusters;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 14 pages, 3 tables, 7 figures, appeared in Journal of Astrophysics and Astronomy