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Quiescent photometric modulations of two low-inclination cataclysmic variables KZ Geminorum and TW Virginis
Dai ZB(戴智斌)1,2,3; Szkody, Paula4; Taani, Ali5; Garnavich, Peter M6; Kennedy, Mark7
Source PublicationASTRONOMY & ASTROPHYSICS
2017-10-05
Volume606
DOI10.1051/0004-6361/201731310
Contribution Rank第1完成单位
Indexed BySCI ; EI
Keywordbinaries close novae, cataclysmic variables stars: individual: KZ Gem stars: individual: TW Vir
Abstract

Aims. The quiescent periodic photometric modulations of two low-inclination cataclysmic variables observed in Kepler K2 Campaigns 0 and 1, KZ Gem and TWVir, are investigated. 

Methods. A phase-correcting method was successfully used to detect the orbital modulations of KZ Gem and TWVir and improve their orbital periods. The light curve morphologies of both CVs were further analyzed by defining flux ratios and creating colormaps. 

Results. KZ Gem shows ellipsoidal modulations with an orbital period of 0.22242(1) day, twice the period listed in the updated RK catalogue (Edition 7.24). With this newly determined period, KZ Gem is no longer a CV in the period gap, but a long-period CV. A part of the quiescent light curve of TWVir that had the highest stability was used to deduce its improved orbital period of 0.182682(3) day. The flat patterns shown in the colormaps of the flux ratios for KZ Gem demonstrate the stability of their orbital modulations, while TWVir show variable orbital modulations during the K2 datasets. In TWVir, the single versus double-peaked nature of the quiescent orbital variations before and after superoutburst may be related to the effect of the superoutburst on the accretion disk.

Funding ProjectCAS Light of West China Program ; Science Foundation of Yunnan Province[2016FB007] ; NSF grant[AST-1514737] ; Naughton Foundation ; UCC Strategic Research Fund
Funding OrganizationCAS Light of West China Program ; Science Foundation of Yunnan Province[2016FB007] ; NSF grant[AST-1514737] ; Naughton Foundation ; UCC Strategic Research Fund
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherEDP SCIENCES S A
Publication Place17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN0004-6361
URL查看原文
WOS IDWOS:000412876200010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDWARF NOVAE ; RZ LEONIS ; CATALOG ; PERIOD ; BINARIES ; EDITION ; ATLAS ; MISSION
EI Accession Number20174404360030
EI KeywordsOrbits
EI Classification Number657.2Extraterrestrial Physics and Stellar Phenomena - 941.4Optical Variables Measurements
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10182
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorDai ZB(戴智斌)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming; 650216, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming; 650216, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing; 100012, China
4.University of Washington, Seattle; WA; 98195, United States
5.Applied Sciences Department, Aqaba University College, Al-Balqa' Applied University, PO Box 1199, Aqaba; 77110, Jordan
6.University of Notre Dame, Notre Dame; IN; 46556, United States
7.Department of Physics, University College Cork, Cork, Ireland
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Dai ZB,Szkody, Paula,Taani, Ali,et al. Quiescent photometric modulations of two low-inclination cataclysmic variables KZ Geminorum and TW Virginis[J]. ASTRONOMY & ASTROPHYSICS,2017,606.
APA Dai ZB,Szkody, Paula,Taani, Ali,Garnavich, Peter M,&Kennedy, Mark.(2017).Quiescent photometric modulations of two low-inclination cataclysmic variables KZ Geminorum and TW Virginis.ASTRONOMY & ASTROPHYSICS,606.
MLA Dai ZB,et al."Quiescent photometric modulations of two low-inclination cataclysmic variables KZ Geminorum and TW Virginis".ASTRONOMY & ASTROPHYSICS 606(2017).
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