Roche Model and Absolute Dimensions of the Eclipsing Binary Y Cam with a Pulsating Component

• Main Authors: J. W. Lee, C. -H. Kim, S. -L. KIM, J. -H. Youn, S. -G. Kwon
• Format: Article
• Language: English
• Published: Korean Space Science Society (KSSS) 2002-09-01
• Series: Journal of Astronomy and Space Sciences
• Subjects: eclipsing binary; photometry; Roche model; absolute dimension
• Online Access: http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2002/v19n3/OJOOBS_2002_v19n3_187.pdf

We performed CCD photometric observations of the eclipsing binary Y Cam with a pulsating component, for 16 nights from November 2000 to May 2001 using a V filter attached to the 61-cm reflector at Sobaeksan Optical Astronomy Observatory. Our V light curve and Broglia & Marin's (1974) BV ones were analyzed with Mode 2 for a detached Roche model as well as Model 5 for a semi-detached one in the Wilson-Devinney code. From the analysis, we found the following results: 1) It is hardly discernible from only light curve synthesis which model between the detached and semi-detached ones is a real Roche model of Y Cam. 2) There exist the third light of about 2% and 3% in B and V light curves of Y Cam, respectively. 3) The light curve solution is immune from the light variation due to the pulsation of the primary component of Y cam. However, the detached model rather than the semi-detached one has slightly better fitted to the observations which were get rid of the pulsation effect. 4) The absolute dimensions of Y Cam were calculated for two Roche models.