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http://dx.doi.org/10.5303/PKAS.2012.27.5.399

VARIABLE STARS IN THE REGION OF CYG OB3 ASSOCIATION CENTERED ON THE OPEN CLUSTER NGC 6871 I: δ SCUTI TYPE STARS  

Jeon, Young-Beom (Korea Astronomy and Space Science Institute)
Lee, Uiryeol (Korea Advanced Institute of Science and Technology)
Park, Yoon-Ho (Korea Astronomy and Space Science Institute)
Kim, Donghyeon (Yonsei University)
Jang, Hyeeun (Seoul National University)
Cho, Sungyoon (Korea Advanced Institute of Science and Technology)
Publication Information
Publications of The Korean Astronomical Society / v.27, no.5, 2012 , pp. 399-409 More about this Journal
Abstract
As a part of the short-period variability survey (SPVS) at Bohyunsan Optical Astronomy Observatory, we obtained time-series BV CCD images in the region of Cyg OB3 association centered on the open cluster NGC 6871. The observations were performed for 18 nights from September 5, 2008 to September 1, 2009. We found 15 short-period variable stars in the region. They are ${\delta}$ Scuti type stars belonging to the local spiral arm, Orion spur. Among them, only two stars were previously known, and the rest are newly discovered ones. In this paper, we have performed a multiple-frequency analysis to determine frequencies of the 15 ${\delta}$ Scuti type stars, using the discrete Fourier transform and linear least-square fitting methods. One of the newly discovered variable stars is a double-mode ${\delta}$ Scuti type star with the fundamental and the first overtone modes, and two are high amplitude ${\delta}$ Scuti stars.
Keywords
OB associations; individual (Cyg OB3); open clusters; individual (NGC 6871); stars: variables (${\delta}$ Scuti);
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Times Cited By KSCI : 7  (Citation Analysis)
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