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DEEP, LOW MASS RATIO OVERCONTACT BINARY SYSTEMS. XIII. DZ PISCIUM WITH INTRINSIC LIGHT VARIABILITY
Yang YG(杨远贵)1,2; Qian SB(钱声帮)2; Zhang, LY3; Dai, HF1; Soonthornthum, B4; Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2013-08
Volume146Issue:2
DOI10.1088/0004-6256/146/2/35
Contribution Rank第2完成单位
Indexed BySCI
KeywordBinaries: Eclipsing Stars: Activity Stars: Individual (Dz Piscium)
AbstractNew multi-color photometry for the eclipsing binary DZ Psc was performed in 2011 and 2012 using the 85 cm telescope at the Xinglong Station of the National Astronomical Observatories of China. Using the updated Wilson-Devinney (W-D) code, we deduced two sets of photometric solutions. The overcontact degree is f = 89.7(+/- 1.0)%, identifying DZ Psc as a deep, low mass ratio overcontact binary. The asymmetric light curves (i.e., LC2 in 2012) were modeled by a hot spot on the primary star. Based on all of the available light minimum times, we discovered that the orbital period of DZ Psc may be undergoing a secular period increase with a cyclic variation. The modulated period and semi-amplitude of this oscillation are P-mod = 11.89(+/- 0.19) yr and A = 0.0064(+/- 0.0006) days, which may be possibly attributed to either cyclic magnetic activity or light-time effect due to the third body. The long-term period increases at a rate of dP/dt = +7.43(+/- 0.17) x 10(-7) days yr(-1), which may be interpreted as conserved mass transfer from the less massive component to the more massive one. With mass transferring, DZ Psc will finally merge into a rapid-rotation single star when J(spin)/J(orb) > 1/3.
Funding OrganizationNational Natural Science Foundation of China [U1231102, 11133007, 11263001] ; Anhui Provincial Natural Science Foundation [1208085MA04]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
WOS IDWOS:000321841100017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPHYSICAL PARAMETERS ; ECLIPSING BINARIES ; PERIOD CHANGES ; STARS ; CURVES ; BOOTIS ; COMPONENTS ; VELOCITY ; CATALOG ; CYGNI
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5881
Collection双星与变星研究组
Corresponding AuthorYang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
Affiliation1.School of Physics and Electronic Information, Huaibei Normal University, 235000 Huaibei, Anhui Province, China
2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, China
3.Department of Physics, College of Science, Guizhou University, 550025 Guiyang, China
4.National Astronomical Research Institute of Thailand/Ministry of Science and Technology, Bangkok, Thailand
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang YG,Qian SB,Zhang, LY,et al. DEEP, LOW MASS RATIO OVERCONTACT BINARY SYSTEMS. XIII. DZ PISCIUM WITH INTRINSIC LIGHT VARIABILITY[J]. ASTRONOMICAL JOURNAL,2013,146(2).
APA Yang YG,Qian SB,Zhang, LY,Dai, HF,Soonthornthum, B,&Yang, YG .(2013).DEEP, LOW MASS RATIO OVERCONTACT BINARY SYSTEMS. XIII. DZ PISCIUM WITH INTRINSIC LIGHT VARIABILITY.ASTRONOMICAL JOURNAL,146(2).
MLA Yang YG,et al."DEEP, LOW MASS RATIO OVERCONTACT BINARY SYSTEMS. XIII. DZ PISCIUM WITH INTRINSIC LIGHT VARIABILITY".ASTRONOMICAL JOURNAL 146.2(2013).
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