Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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PHOTOMETRIC SOLUTIONS OF W UMA TYPE STARS: GSC2576-0319 AND GSC2584-1731

W UMa형 식쌍성 GSC2576-0319와 GSC2584-1731의 측광해

  • Lee, Chung-Uk (Korea Astronomy and Space Science Institute) ;
  • Lee, Jae-Woo (Korea Astronomy and Space Science Institute) ;
  • Jin, Ho (Korea Astronomy and Space Science Institute) ;
  • Kim, Chun-Hwey (Department of Astronomy & Space Science, College of Natural Sciences and Institute for Basic Science Research, Chungbuk National University)
  • 이충욱 (한국천문연구원) ;
  • 이재우 (한국천문연구원) ;
  • 진호 (한국천문연구원) ;
  • 김천휘 (충북대학교 자연과학대학 천문우주학과, 기초과학연구소)
  • Published : 2006.12.10
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Abstract

High-precision photometric observations were performed in BVI bandpasses using Am robotic telescope at Mt. Lemmon Observatory for two binary stars, which are reclassified as W UMa-type systems from ROTSE(Robotic Optical Transient Search Experiment) follow-up observations and show peculiar light variations. In order to analyze W UMa-type eclipsing binaries systematically, the light curve analysis script using 2005 version of Wilson-Devinney binary code is constructed. The orbital inclinations of GSC2S84-1731 and GSC2576-0319 are $43.^{\circ}5\;and\;57.^{\circ}6$ from light-curve analysis, respectively. Spot model is applied to explain the asymmetric light curve for GSC2S84-1731 and the spot parameters are derived.

ROTSE(Robotic Optical Transient Search Experiment) 후속관측을 통하여 W UMa형 식쌍성으로 재분류했던 변광성 중 광도곡선의 형태가 특이한 2개의 변광성에 대하여 2004년 5월 1일부터 5일간에 걸쳐 레몬산천문대 1m 망원경을 이용하여 고정밀 측광관측을 BVI 영역에서 수행하였다. W UMa형 식쌍성의 체계적인 분석을 위하여 2005년 개정한 Wilson-Devinney 쌍성코드를 사용하는 광도곡선분석 스크립트를 작성하였다. GSC2576-0319와 GSC2584-1731의 광도곡선을 분석하여 얻은 궤도경사각 (i)은 $43.^{\circ}5$와 $57.^{\circ}6$로써 비교적 낮은 값을 가지고 있으며, GSC2S84-1731의 광도곡선상 비대칭 효과를 설명하기 위하여 흑점모델을 적용하고, 이때의 흑점인자를 결정하였다.

Keywords

References

  1. 이충욱, 박성수, 김천휘, 변용익 2003, 한국우주과학회지, 20, 143
  2. Akerlof, C., Amrose, S., Balsano, R., Bloch, J., Casperson, D., Fletcher, S., Gisler, G., Hills, J., Kehoe, R., Lee, B., Marshall, S., McKay, T., Pawl, A., Schaefer, J., Szymanski, J., & Wren, J. 2000, AJ, 119, 1901 https://doi.org/10.1086/301321
  3. Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A. C., Bennett, D. P., Cook, K. H., Freeman, K.C., Griest, K., Lacy, C. H. S., Lehner, M. J., Marshall, S. L., Minniti, D., Peterson, B. A., Pratt, M. R., Quinn, P. J., Rodgers, A. W., Stubbs, C. W., Sutherland, W., & Welch, D. L. 1997, AJ, 114, 326 https://doi.org/10.1086/118477
  4. Csizmadia, Sz. & Klagyivik, P. 2004, A&A, 426, 1001 https://doi.org/10.1051/0004-6361:20040430
  5. Devor, J. 2005, ApJ, 628, 411 https://doi.org/10.1086/431170
  6. Flower, P. 1996, ApJ, 469, 355 https://doi.org/10.1086/177785
  7. Graczyk, D. 2003, MNRAS, 342, 1334 https://doi.org/10.1046/j.1365-8711.2003.06636.x
  8. Grison, P., Beaulieu, J.-P., Pritchard, J. D., Tobin, W., Ferlet, R., Vidal-Madjar, A., Guibert, J., Alard, C., Moreau, O., Tajahmady, F., Maurice, E., Prevot, L., Gry, C., Aubourg, E., Bareyre, P., Brehin, S., Gros, M., Lachieze-Rey, M., Laurent, B., Lesquoy, E., Magneville, C., Milsztajn, A., Moscoso, L., Queinnec, F., Renault, C., Rich, J., Spiro, M., Vigroux, L., Zylberajch, S., Ansari, R., Cavalier, F., & Moniez, M. 1995, A&A, 109, 447
  9. Jin, H., Kim, S.-L., Kwon, S.-G., Youn, J.-H., Lee, C.-U., Lee, D.-J., & Kim, K.-S. 2003, A&A, 404, 621 https://doi.org/10.1051/0004-6361:20030500
  10. Jin, H., Kim, S.-L., Lee, C.-U., Lee, D.-J., & Kim, K.-S. 2004, AJ, 128, 1847 https://doi.org/10.1086/423908
  11. Lucy, L. B. 1967, Zeitschrift fur Astrophysik, 65, 89
  12. Michalska, G. & Pigulski, A. 2005, A&A, 434, 89 https://doi.org/10.1051/0004-6361:20042343
  13. Oblak, E., Kurpinska-Winiarska, M., Kundera, T., Zola, S., & Dworal, T. Z. 1998, HiA, 11, 569
  14. Rucinski, S. M. 1969, Acta Astronomica, 19, 245
  15. Tamuz, O., Mazeh, T., & North, P. 2006, MNRAS, 367, 1521 https://doi.org/10.1111/j.1365-2966.2006.10049.x
  16. Tamuz, O., Mazeh, T., & Zucker, S. 2005, MNRAS, 356, 1466 https://doi.org/10.1111/j.1365-2966.2004.08585.x
  17. Van Hamme, W. 1993, AJ, 106, 209
  18. Wilson, R.E. & Devinney, E. J. 1971, ApJ, 166, 605 https://doi.org/10.1086/150986
  19. Wyithe, J. S. B. & Wilson, R. E. 2001, ApJ, 559, 260 https://doi.org/10.1086/322378
  20. Wyrzykowski, L., Udalski, A., Kubiak, M., Szymanski, M., Zebrun, K., Soszynski, I., Wozniak, P. R., Pietrzynski, G., & Szewczyk, O. 2003, Acta Astronomica, 53, 1 https://doi.org/10.1016/S0094-5765(02)00195-9
  21. Zacharias, N., Monet, D. G., Levine, S. E., Urban, S. E., Gaume, R., & Wycoff, G. L. 2004, AAS, 205, 4815