Be Stars in the Open Cluster NGC 6830
Abstract
We report the discovery of 2 new Be stars, and re-identify one known Be star in the open cluster NGC 6830. Eleven H-alpha emitters were discovered using the H-alpha imaging photometry of the Palomar Transient Factory Survey. Stellar membership of the candidates was verified with photometric and kinematic information using 2MASS data and proper motions. The spectroscopic confirmation was carried out by using the Shane 3-m telescope at Lick observatory. Based on their spectral types, three H-alpha emitters were confirmed as Be stars with H-alpha equivalent widths > -10 Angstrom. Two objects were also observed by the new spectrograph SED-Machine on the Palomar 60 inch Telescope. The SED-Machine results show strong H-alpha emission lines, which are consistent with the results of the Lick observations. The high efficiency of the SED-Machine can provide rapid observations for Be stars in a comprehensive survey in the future.
Keywords
Cite
@article{arxiv.1604.02276,
title = {Be Stars in the Open Cluster NGC 6830},
author = {Po-Chieh Yu and Chien-Cheng Lin and Hsing-Wen Lin and Chien-De Lee and Nick Konidaris and Chow-Choong Ngeow and Wing-Huen Ip and Wen-Ping Chen and Hui-Chen Chen and Matthew A. Malkan and Chan-Kao Chang and Russ Laher and Li-Ching Huang and Yu-Chi Cheng and Rick Edelson and Andreas Ritter and Robert Quimby and Sagi Ben-Ami and Eran. O. Ofek and Jason Surace and Shrinivas R. Kulkarni},
journal= {arXiv preprint arXiv:1604.02276},
year = {2016}
}
Comments
11 pages, 8 figures, AJ in press