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CCD Photometry of the W UMa type star QX Andromeda
Ren, A. B.1; Zhang, X. B.2; Luo, C. Q.3; Luo, Y. P.3; Deng, L. C.2; Luo, Z. Q.1
Source PublicationNEW ASTRONOMY
AbstractWe present new B- and V-band photometry of the W UMa-type binary system QX And, which is a member of the open cluster NGC 752. Revised orbital period and new ephemerides were given for the binary system based on the data of times of light minima. The result of a period analysis reveals that the system is undergoing a continuous orbital period increase during the past decades. The rate of period increasing turns out to be about 2.7 x 10(-7) d yr(-1). With the Wilson-Devinney code, a photometric solution is computed. It yields a contact configuration for the system with a filling factor of 0.361. Combining the results from the photometric solution along with that from the radial-velocity observations, we have determined the absolute parameters for the two components of the system. The masses, radii and luminosity of the primary and secondary stars are calculated as 1.43 +/- 0.04 M(circle dot) 1.45 +/- 0.09 R(circle dot), 2.87 +/- 0.40 L(circle dot) and 0.44 +/- 0.02 M(circle dot), 0.87 +/- 0.05 R(circle dot), 0.99 +/- 0.13 L(circle dot), respectively. The evolutionary status and physical nature of the contact binary system were discussed compared with the theoretical models. (C) 2010 Elsevier RV. All rights reserved.
KeywordBinaries: Close Binaries: Eclipsing Open Cluster And Associations: Individual (Ngc 752) Stars: Evolution Stars Individual (Qx Andromeda)
Indexed BySCI
WOS IDWOS:000285660400010
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Document Type期刊论文
Affiliation1.China W Normal Univ, Inst Theoret Phys, Nanchong 637002, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China
Recommended Citation
GB/T 7714
Ren, A. B.,Zhang, X. B.,Luo, C. Q.,et al. CCD Photometry of the W UMa type star QX Andromeda[J]. NEW ASTRONOMY,2011,16(3):194-198.
APA Ren, A. B.,Zhang, X. B.,Luo, C. Q.,Luo, Y. P.,Deng, L. C.,&Luo, Z. Q..(2011).CCD Photometry of the W UMa type star QX Andromeda.NEW ASTRONOMY,16(3),194-198.
MLA Ren, A. B.,et al."CCD Photometry of the W UMa type star QX Andromeda".NEW ASTRONOMY 16.3(2011):194-198.
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