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A Phenomenological Model for the Light Curve of Three Quiescent Low-inclination Dwarf Novae and One Pre-cataclysmic Variable

文献类型：期刊论文

作者Dai, Zhibin2,3,4,5,6; Szkody, Paula1; Kennedy, Mark7; Su, Jie2,3,5; Medagangoda, N. Indika8; Robinson, Edward L.9; Garnavich, Peter M.10; De Silva, L. Malith M.11
刊名ASTRONOMICAL JOURNAL
出版日期2018-10-01
卷号156期号:4页码:17
ISSN号0004-6256
关键词binaries (including multiple): close novae, cataclysmic variables white dwarfs
DOI10.3847/1538-3881/aadb99
英文摘要We used the light curve code XRBinary to model the quiescent K2 light curves of three low-inclination cataclysmic variables (CVs): 1RXS J0632+2536 (J0632+2536), RZ Leo, TW Vir and the pre-CV WD 1144+011. Optimized light curve models were obtained using a nonlinear fitting code NMfit and visualized by Phoebe 2.0. The disk model of J0632+2536 shows that one hotspot at the edge of the disk is enough to describe its light curve, while the other two dwarf nova (DN): RZ Leo and TW Vir require two hotspots. A typical pre-CV model with a weak irradiation effect for WD 1144+011 can explain its single-hump modulation and the newly observed spectrum confirms its previous classification. The synthetic analyses for the DN clearly indicate that phase zero of the double-hump modulations occurs around the secondary minimum and the primary hump is mainly caused by the hotspot at the edge of the disk. The quiescent disk has a flat temperature distribution with a power index of -0.11. The disk model of RZ Leo implies a truncated disk, supporting its previously speculated classification as an intermediate polar (IP). Except for the IP model of RZ Leo, which lacks a component related to the inferred accretion curtain, the models of J0632+2536, TW Vir and WD 1144+011 are consistent with results from the Gaia mission. The derived masses and radii of the secondaries of the three DN are consistent with the semi-empirical relations for CV donor stars, while their effective temperatures are higher than the predictions. Irradiation of the donor stars is investigated to explain this discrepancy.
WOS关键词X-RAY BINARIES ; ACCRETION DISKS ; WHITE-DWARFS ; RZ LEONIS ; BOLOMETRIC CORRECTIONS ; EFFECTIVE TEMPERATURES ; Z-CHAMAELEONTIS ; MASS-RADIUS ; SPACED DATA ; HOT-SPOT
资助项目CAS Light of West China Program ; Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Science Foundation of Yunnan Province[2016FB007] ; NSF[AST-1514737] ; Royal Society ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000444462300004
资助机构CAS Light of West China Program ; CAS Light of West China Program ; Chinese Natural Science Foundation ; Chinese Natural Science Foundation ; Science Foundation of Yunnan Province ; Science Foundation of Yunnan Province ; NSF ; NSF ; Royal Society ; Royal Society ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; CAS Light of West China Program ; CAS Light of West China Program ; Chinese Natural Science Foundation ; Chinese Natural Science Foundation ; Science Foundation of Yunnan Province ; Science Foundation of Yunnan Province ; NSF ; NSF ; Royal Society ; Royal Society ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; CAS Light of West China Program ; CAS Light of West China Program ; Chinese Natural Science Foundation ; Chinese Natural Science Foundation ; Science Foundation of Yunnan Province ; Science Foundation of Yunnan Province ; NSF ; NSF ; Royal Society ; Royal Society ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; CAS Light of West China Program ; CAS Light of West China Program ; Chinese Natural Science Foundation ; Chinese Natural Science Foundation ; Science Foundation of Yunnan Province ; Science Foundation of Yunnan Province ; NSF ; NSF ; Royal Society ; Royal Society ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/22707]  
专题中国科学院国家天文台
通讯作者Dai, Zhibin
作者单位1.Univ Washington, Seattle, WA 98195 USA
2.Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China
5.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
6.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
7.Univ Manchester, Ctr Astrophys, Sch Phys & Astron, Jodrell Bank, Manchester M13 9PL, Lancs, England
8.Arthur C Clarke Inst Modern Technol, Moratuwa, Sri Lanka
9.Univ Texas Austin, Austin, TX 78712 USA
10.Univ Notre Dame, Notre Dame, IN 46556 USA
推荐引用方式
GB/T 7714		 Dai, Zhibin,Szkody, Paula,Kennedy, Mark,et al. A Phenomenological Model for the Light Curve of Three Quiescent Low-inclination Dwarf Novae and One Pre-cataclysmic Variable[J]. ASTRONOMICAL JOURNAL,2018,156(4):17.
APA Dai, Zhibin.,Szkody, Paula.,Kennedy, Mark.,Su, Jie.,Medagangoda, N. Indika.,...&De Silva, L. Malith M..(2018).A Phenomenological Model for the Light Curve of Three Quiescent Low-inclination Dwarf Novae and One Pre-cataclysmic Variable.ASTRONOMICAL JOURNAL,156(4),17.
MLA Dai, Zhibin,et al."A Phenomenological Model for the Light Curve of Three Quiescent Low-inclination Dwarf Novae and One Pre-cataclysmic Variable".ASTRONOMICAL JOURNAL 156.4(2018):17.

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