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ISSN : 1225-1534(Print)
ISSN : 2287-6936(Online)
Publications of the Korean Astronomical Society Vol.32 No.3 pp.421-438
DOI : http://dx.doi.org/10.5303/PKAS.2017.32.3.421

VARIABLE STARS IN THE REGION OF THE OPEN CLUSTER NGC 457

Young-Beom Jeon, Yoon-Ho Park, Sang-Min Lee
Korea Astronomy and Space Science Institute/Kyungbuk National University
Korea Astronomy and Space Science Institute
Korea Astronomy and Space Science Institute

Abstract

Through the short-period variability survey program, we obtained time-series BV CCD images for 1.5° X 1.0° region around the young open cluster NGC 457. As a result, we have detected 61 variable stars including 31 new ones after checking light curves of all stars by eyes. The 61 variable stars were included 14 δ Scuti variable stars, a β Cephei variable star, 10 variable Be and slowly pulsating B stars, 13 eclipsing binary stars, 21 semi-long periodic or slow irregular variables and an RR Lyrae variable star, respectively. Many variable B-type stars were known through a well-defined zero-age main sequence to the β Cepheid region of NGC 457. Most of the variable B-type stars found this paper were known variable stars. But, 11 out of 14 δ Scuti variable stars were newly discovered. The new variable stars except for δ Scuti stars were 4 variable B-type stars, 5 eclipsing binaries and 11 semi-long periodic or slow irregular variables. We have performed frequency analysis for all δ Scuti stars, a β Cepheid star and an RR Lyrae star.

초록

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  1. Journal Abbreviation : PKAS
    Frequency : Three times a year
    Doi Prefix : 10.5303/PKAS.
    Year of Launching : 1984
    Publisher : The Korean Astronomical Society
    Indexed/Tracked/Covered By :

  2. Online Submission

    http://submission.kas.org/

  3. The Korean
    Astronomical Society
    (KAS)

  4. Editorial Office
    Contact Information

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