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VARIABLE STARS IN THE REGION OF AN OPEN CLUSTER M50

산개성단 M50 영역의 변광성

  • Published : 2008.12.31

Abstract

From the short-period variability survey (SPVS), we obtained time-series BV CCD images in the region of an open cluster M50 (NGC 2323) for 10 nights from 2008 February 9 to 27. The observation was performed using a small refracting telescope (${\phi}$=155mm, f=1050mm) in Bohyunsan Optical Astronomy Observatory (BOAO). M50 is included in the observing field of ASAS (The All Sky Automated Survey). In the region of M50, we found 8 new variable stars including two ${\delta}$ Scuti stars with short-periods and very small amplitudes. There are known nine variable stars by the catalogues of ASAS and GCVS in the region. We confirmed the variability of the known variable stars for six and non-variability for three.

Keywords

References

  1. Breger, M., 1979, Delta Scuti & Related Stars, PASP, 91, 5 https://doi.org/10.1086/130433
  2. Breger, M., Stich, J., Garrido, R., et al., 1993, Nonradial Pulsation of the Delta-Scuti Star Bu-Cancri in the Praesepe Cluster, A&Ap, 271, 482
  3. Claria, J. J., Piatti, A. E., & Lapasset, E., 1998, Photometric study of the open cluster NGC 2323, A&Ap Suppl., 127, 2436
  4. Jeon, Y.-B., Nam, K.-H., Kim, S.-L., et al., 2004a, A New Field $\delta$ Scuti Star : HD 235428, PKAS, 19, 27
  5. Jeon, Y.-B., Nam, K.-H., Park, Y.-H., et al., 2004b, A New Field $\delta$ Scuti Star : GSC 03665-00576, PKAS, 19, 33
  6. 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 https://doi.org/10.5303/PKAS.2007.22.4.141
  7. Jeon, Y.-B., Kim, S.-L., Park, Y.-H., et al., 2005a, Short-Period Variability Survey (SPVS) in BOAO, PKAS, 20, 21
  8. Jeon, Y.-B., Park, Y.-H., Nam, K.-H., et al., 2005b, New Variable Stars around the Cepheid Variable TU Cas, PKAS, 20, 29
  9. Jin, H., Kim, S.-L., Lee, C.-U., Lee, D.J., & Kim, K.- S., 2004, Reclassification of ROTSE-I $\delta$ Scuti type stars with Multiband photometry and Fourier Decomposition, AJ, 128, 1847 https://doi.org/10.1086/423908
  10. Kalirai, J. S., Fahlman, G. G., Richer, H. B., & Ventura, P., 2003, THE CFHT Open Star Cluster Survey. IV. Two Rich, Young Open Star Clusters: NGC 2168 (M35) and NGC 2323 (M50), AJ, 126, 1402 https://doi.org/10.1086/377320
  11. 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
  12. Lee, E.-J., Jeon, Y.-B., Lee, H., & Park, H.-S., 2007, A Search for New Variable Stars in the Open Cluster NGC 129 using a Small Telescop, JKAS, 28, 87 https://doi.org/10.5467/JKESS.2007.28.1.087
  13. Massey, P. & Davis, L. E., 1992, A User's Guide to Stellar CCD photometry with IRAF
  14. Pojmanski, G., Pilecki, B., & Szczygiel, D., 2005, The All Sky Automated Survey. The Catalog of Variable Stars. V. Declinations 0 deg - 28 deg of the Northern Hemisphere, Acta Astronomica, 55, 275
  15. Rucinski, S. M., 2007, The short period end of the contact binary period distribution based on the All Sky Automated Survey (ASAS), MNRAS, 382, 393 https://doi.org/10.1111/j.1365-2966.2007.12377.x
  16. Samus, N. N., Durlevich, O. V., et al., 2004, Combined General Catalogue of Variable Stars (Samus+2004), VizieR Online Data Catalog, 2250
  17. Stetson, P. B., 1987, DAOPHOT - A computer program for crowded-field stellar photometry, PASP, 99, 191 https://doi.org/10.1086/131977
  18. Sung, H. & Bessell, M. S., 1999, UBVI CCD photometry of M35 (NGC 2168), MNRAS, 306, 361-370 https://doi.org/10.1046/j.1365-8711.1999.02522.x

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