Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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PHOTOMETRIC OBSERVATIONS OF THE CONTACT BINARY SYSTEM CC COM

접촉쌍성 CC Com의 측광학적 관측과 분석

  • Jeong, Jang-Hae (Dept. of Astronomy and Space Science, Chungbuk National University) ;
  • Kim, Chun-Hwey (Dept. of Astronomy and Space Science, Chungbuk National University) ;
  • Kim, Yong-Gi (Dept. of Astronomy and Space Science, Chungbuk National University)
  • 정장해 (충북대학교 천문우주학과) ;
  • 김천휘 (충북대학교 천문우주학과) ;
  • 김용기 (충북대학교 천문우주학과)
  • Published : 2007.06.10
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Abstract

A total of 824 observations (206 in ${\Delta}B$, 206 in ${\Delta}V$, 206 in ${\Delta}R$, 206 in ${\Delta}I$ for CC Com were made on 3 nights from March 3 to April 3 in 2002 using the 61cm telescope with 2K CCD camera of the Sobaeksan Optical Astronomy Observatory of KASI. From our observations 9 times of minimum light were newly determined. Combined analysis of our new BVRI light curves with the double-lined radial velocity curves of Pribulla et al. (2007) were made with the 2004 Wilson-Devinney(WD) binary model code to yield new physical parameters of the CC Com system. Small asymmetries in light curves were explained with the adoption of two hot spots on the cool secondary.

W UMa형 접촉쌍성 CC Com을 소백산 천문대에서 61cm 망원경과 2K CCD 카메라로 2002년 3월 3일부터 4월 3일까지 3일간 측광관측하여 총 824개의 관측점(${\Delta}B$: 206점, ${\Delta}V$: 206점, ${\Delta}R$: 206점, ${\Delta}I$: 206점)을 얻었다. 우리의 관측점으로부터 9개의 새로운 극심시각(주극심: 6개, 부극심: 3개)을 산출하였다. 2004년 Wilson-Devinney(WD) 쌍성 모형 계산 프로그램으로 우리가 얻은 새로운 BVRI 광도곡선과 발표된 이중시선속도 곡선들을 결합하여 분석함으로서 CC Com의 제 물리요소를 새롭게 산출하였다. 광도곡선에 나타난 작은 비대칭을 반성에 고온 반점 2개를 도입하여 설명하였다.

Keywords

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