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http://dx.doi.org/10.5303/PKAS.2017.32.3.421

VARIABLE STARS IN THE REGION OF THE OPEN CLUSTER NGC 457  

Jeon, Young-Beom (Korea Astronomy and Space Science Institute)
Park, Yoon-Ho (Korea Astronomy and Space Science Institute)
Lee, Sang-Min (Korea Astronomy and Space Science Institute)
Publication Information
Publications of The Korean Astronomical Society / v.32, no.3, 2017 , pp. 421-438 More about this Journal
Abstract
Through the short-period variability survey program, we obtained time-series BV CCD images for $1.5^{\circ}{\times}1.0^{\circ}$ 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 ${\delta}$ Scuti variable stars, a ${\beta}$ 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 ${\beta}$ Cepheid region of NGC 457. Most of the variable B-type stars found this paper were known variable stars. But, 11 out of 14 ${\delta}$ Scuti variable stars were newly discovered. The new variable stars except for ${\delta}$ 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 ${\delta}$ Scuti stars, a ${\beta}$ Cepheid star and an RR Lyrae star.
Keywords
open clusters: individual (NGC 457); stars: variables: ${\beta}$ Cephei; ${\delta}$ Scuti; eclipsing binary;
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Times Cited By KSCI : 5  (Citation Analysis)
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1 Jeon, Y. -B., Park, Y. -H., Lee, U. Y., et al., 2013, Variable Stars in the Region of CYG OB3 Association Centered on the Open Cluster NGC 6871 II, PKAS, 28, 831
2 Jeon, Y. -B., Park, Y. -H., & Lee, S. M., 2016, Variable Stars in the Region of the Open Cluster NGC 225, PKAS, 31, 43
3 Jin, H., Kim, S. -L., Lee, C. -U., et al., 2004, Reclassification of ROTSE-I ${\delta}$ Scuti Stars with Multiband Photometry and Fourier Decomposition, AJ, 128, 1847   DOI
4 Kim, S. -L., & Lee, S. -W., 1995, CCD Photometry of a Delta Scuti Star in an Open Cluster II. BT CNC in the Praesepe, JKAS, 28, 197
5 Maciejewski, G., Bukowiecki, L., Brozek, T., et al., 2008, Variable stars in the field of the open cluster NGC 457, Inf. Bull. Var. Stars, 5864, 1 (MA08)
6 Massey, P., & Davis, L. E., 1992, A User's Guide to Stellar CCD photometry with IRAF
7 Moffat, A. F.J., 1972, Photmetry of eleven young open star clusters, A&AS, 7, 355
8 Mozdzierski, D., Pigulski, A., Kopacki, G., Kolaczkowski, Z., & Steslicki, M. 2014, A CCD Search for Variable Stars of Spectral Type B in the Northern Hemisphere Open Clusters. IX. NGC 457, Acta Astronomica, 64, 89 (MO14)
9 Pesch, P., 1959, The galactic cluster NGC 457, ApJ, 130, 764   DOI
10 Phelps, R. L., & Janes, K. A., 1994, Young Open Clusters as Probes of the Star Formation Process. I. An Atlas of Open Cluster Photometry, AJ Suppl., 90, 31   DOI
11 Samus, N. N., Durlevich, O. V., et al., 2004, Combined General Catalogue of Variable Stars (Samus+2004), VizieR Online Data Catalog, 2250
12 Stetson, P. B., 1987, DAOPHOT - A Computer Program for Crowded-field Stellar Photometry, PASP, 99, 191   DOI
13 Sung, H., Lim, B.; Bessell, M. S., et al., 2013, Sejong Open Cluster Survey (SOS). 0. Target Selection and Data Analysis, JKAS, 46, 103
14 Breger, M., 1979, ${\delta}$ Scuti and Related Stars, PASP, 91, 5   DOI
15 Wenger, et al., 2000, The SIMBAD astronomical database, A&AS,143,9   DOI
16 Zacharias, N., Finch, C. T., Girard, T. M., Henden, A., Bartlett, J. L., Monet, D. G., & Zacharias, M. I., 2012, UCAC4 Catalogue, VizieR On-line Data Catalog: I/322. Originally published in: 2012 yCat.1322, 0
17 Zhang, X. B., Luo, C. Q., & Fu, J. N., 2012, B-type Variables in the Young Open Cluster NGC 457, AJ, 144, 86 (ZHA12)   DOI
18 Breger, M., et al., 1993, Nonradial Pulsation of the Delta-Scuti Star Bu-Cancri in the Praesepe Cluster, A&A, 271, 482
19 Dias, W. S., Monteiro, H., Caetano, T. C., Lepine, J. R. D., Assafin, M., & Oliveira, A. F., 2014, Proper Motions of the Optically Visible Open Clusters Based on the UCAC4 Catalog, A&A, 564, 79   DOI
20 Fitzsimmons, A., 1993, CCD Stromgren UVBY photometry of the young clusters NGC 1893, NGC 457, Berkeley 94 and Bochum 1, A&AS, 99, 15
21 Gaia Collaboration, 2016, The Gaia mission, A&A, 595, 1
22 Hoag A. A., Johnson H. L., Iriarte B., Mitchell R .I., Hallam K. L., & Sharpless S., 1961, Photometry of Stars in Galactic Cluster Fields, Publ. Us. Nav. Obs., XVII part VII, 347.
23 Jeon, Y. -B., Kim, S. -L., Park, Y. -H., et al., 2005a, Short-Period Variability Survey (SPVS) in BOAO, PKAS, 20, 21
24 Jeon, Y. -B., Park, Y. -H., Nam, K. -H., et al., 2005b, New Variable Stars around the Cepheid Variable TU Cas, PKAS, 20, 29
25 Jeon, Y. -B., Nam, K. -H., Park, Y. -H., et al., 2007, Preliminary Results for Short-Period Variability Survey (SPVS): New Field Variable Stars, PKAS, 22, 141