A Photometric Study of the W UMa-Type Contact Binary RZ Corn
JiaJia He; ShengBang Qian
Source PublicationChinese Astronomy and Astrophysics
AbstractWe present results of CCD photometric observations of the short-period W UMatype contact binary system, RZ Com. The light curve of the binary has changed from Wsubtype to A-subtype from 1998 to 2003, then back to W-subtype in 2004. An analysis was carried out using the 2003 version of the Wilson-Devinney code. It is confirmed that RZ Com is a low-degree, overcontact f = 20.1% (±7.4%) binary system with a high inclination of i = 81.°40 (±0.°40), and a mass ratio q = 2.351 (±0.031). Combining four newly determined times of light minimum with others in the literature, the variations in orbital period is examined. A small-amplitude oscillation (A=0.0065d), with a period of 41.5 year, is discovered superimposed on a long-term increase at rate dP/dt = +3.97×10-8d yr-1. The period oscillation can be explained either by the light-time effect due to the presence of an unseen third body, or by cycles of magnetic activity on the components. Combining our photometric solution with the spectroscopic elements obtained by Mclean & Hilditch, the absolute dimensions of RZ Com are: M1 = 1.14 (+0.19)Mo, M2 = 0.50 (-4-0.09)Mo, R1= 1.12 (±0.01)R⊙, R2 = 0.78 (±0.01)R⊙ and A = 2.41 (±0.02)R⊙.
Keywordstars binaries close -- stars binaries eclipsing -- stars individual RZ Com
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
JiaJia He,ShengBang Qian. A Photometric Study of the W UMa-Type Contact Binary RZ Corn[J]. Chinese Astronomy and Astrophysics,2008,8(4):465.
APA JiaJia He,&ShengBang Qian.(2008).A Photometric Study of the W UMa-Type Contact Binary RZ Corn.Chinese Astronomy and Astrophysics,8(4),465.
MLA JiaJia He,et al."A Photometric Study of the W UMa-Type Contact Binary RZ Corn".Chinese Astronomy and Astrophysics 8.4(2008):465.
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