Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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LOW MASS RATIO CONTACT BINARY V410 Aur AND V776 Cas-II

질량비가 작은 접촉쌍성 V410 Aur과 V776 Cas-II

  • Oh, Kyu-Dong (Department of Earth Science Education, Chonnam National University) ;
  • Kim, Chun-Hwey (Dept. of Astron. & Space Sci., College of Natural Sciences and Institute for Basic Science Research) ;
  • Kim, Ho-il (Korea Astronomy & Space Science Institute)
  • 오규동 (전남대학고 지구과학교육과) ;
  • 김천휘 (충북대학교 자연과학대학 천문우주학과, 기초과학연구소) ;
  • 김호일 (한국천문연구원)
  • Published : 2005.09.01
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Abstract

New BVR CCD light curves of the low mass ratio contact binaries, V410 Aur and V776 Cas, were observed with the 61 cm reflector and a 2K CCD camera at the Sobaeksan Astronomical Observatory. The absolute dimensions of the low mass ratio contact binaries, V410 Aur and V776 Cas, were obtained using WD program from the published spectroscopic and newly observed photometric data. The evolutionary status of this type of binary system including V410 Aur and V776 Cas has been considered. We reconfirmed that the primary stars of the low mass contact binary system were located on the TAMS and secondary stars were located under the ZAMS in H-R diagram.

질량비가 작은 접촉쌍성 V410 Aur과V776 Cas를 소백산천문대의 61cm망원경에 2K CCD 카메라를 부착하여 측광 관측을 하였으며, 그 결과 이 별들의 새로운 3색(BVR)의 완전한 광도곡선을 얻었다. 새로운 광도곡선과 이미 발표된 분광관측으로부터 WD모델을 이용하여 이 두 별의 궤도요소와 절대 물리량을 얻었다. V410 Aur과 V776 Cas를 포함한 절대물리량이 잘 알려진 19개의 질량비가 작은 접촉쌍성들의 진화 상태를 조사하였다. 그 결과 질량비가 작은 접촉쌍성의 주성은 대부분 TAMS상에 놓이며 반성은 ZAMS 아래 놓이고 있음을 재확인하였다.

Keywords

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