접촉쌍성의 광도와 시선속도곡선의 분석에 의한 절대 물리량과 거리의 결정

• Published in: Journal of astronomy and space sciences pp. 275 - 282
• Main Authors: 이재우, 이충욱, 김천휘, 강용범, 구재림
• Format: Journal Article
• Language: Korean
• Published: 한국우주과학회 01.12.2004
• Subjects: 천문학
• ISSN: 2093-5587; 2093-1409

We completed the light curves of the contact binary CK Boo for 13 nights from June to July in 2004 using the 1-m reflectorand $BVR$ filters at Mt. Lemmon Optical Astronomy Observatory, and determined four new times of minimum light(three timings for primary eclipse, one for secondary). With contact mode of the 1998-version Wilson-Devinney binary model,we analyzed our $BVR$ light curves and Rucinski \& Lu (1999)'s radial-velocity ones. As a result, we found CK booto be A-type overcontact binary ($f$=84\%) with the low mass ratio ($q$=0.11) and orbital inclination ($i$=65$^\circ$).Absolute dimensions of the system are determined from our new solution; $M_1$=1.42$\rm M_\odot$, $M_2$=0.15$\rm M_\odot$,$R_1$=1.47$\rm R_\odot$, $R_2$=0.59$\rm M_\odot$, and the distance to it is derived as about 129pc.Our distance is well consistent with that (157$\pm$33pc) from the Hipparcos trigonometric parallaxwithin the limit of the error yielded by the latter. KCI Citation Count: 0