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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.
发表期刊ASTRONOMICAL JOURNAL
2013-08
卷号146期号:2
DOI10.1088/0004-6256/146/2/35
产权排序第2完成单位
收录类别SCI
关键词Binaries: Eclipsing Stars: Activity Stars: Individual (Dz Piscium)
摘要New 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.
项目资助者National Natural Science Foundation of China [U1231102, 11133007, 11263001] ; Anhui Provincial Natural Science Foundation [1208085MA04]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
WOS记录号WOS:000321841100017
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PHYSICAL PARAMETERS ; ECLIPSING BINARIES ; PERIOD CHANGES ; STARS ; CURVES ; BOOTIS ; COMPONENTS ; VELOCITY ; CATALOG ; CYGNI
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被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5881
专题双星与变星研究组
通讯作者Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
作者单位1.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
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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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