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Long-term photometric behavior of the eclipsing Z Cam-type dwarf nova AY Psc
Han ZT(韩忠涛)1,2,3; Qian SB(钱声帮)1,2,3; Voloshina, Irina4; Zhu LY(朱俐颖)1,2,3
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2017-06-01
Volume17Issue:6Pages:56-65
DOI10.1088/1674-4527/17/6/56
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Stars: Cataclysmic Variables Stars: Individual (Ay Psc)
Abstract

New eclipse timings of the Z Cam-type dwarf nova AY Psc were measured and the orbital ephemeris was revised. In addition, based on long-term AAVSO data, the outburst behaviors were also explored. Our analysis suggests that normal outbursts are quasi-periodic, with an amplitude of similar to 2.5 (+/- 0.1) mag and a period of similar to 18.3 (+/- 0.7) d. The amplitude vs. recurrence-time relation of AY Psc is discussed, and we conclude that this relationmay represent general properties of dwarf nova outbursts. The observed standstill ends with an outburst, which is inconsistent with the general picture of Z Camtype stars. This unusual behavior was considered to be related to mass- transfer outbursts. Moreover, the average luminosity is brighter during standstills than during outburst cycles. The changes in brightness mark variations in. M (over dot)(2) due to the fact that the disk of AY Psc is nearly steady state. M (over dot)(2) value was limited to the range from 6.35 x 10(-9) to 1.18 x 10(-8) M circle dot yr(-1). More detailed examination shows that there are a few small outbursts present during standstills. These events with amplitudes of similar to 0.5-0.9 mag are very similar to the stunted outbursts reported in some nova-like cataclysmic variables. We discussed several possible mechanisms and suggested that the most reasonable mechanism for these stunted outbursts is a changing mass- transfer rate.

Funding ProjectNational Natural Science Foundation of China[11325315] ; National Natural Science Foundation of China[11611530685] ; National Natural Science Foundation of China[11573063] ; National Natural Science Foundation of China[11133007] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Russian Foundation for Basic Research[17-52-53200]
Funding OrganizationNational Natural Science Foundation of China[11325315, 11611530685, 11573063, 11133007] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Russian Foundation for Basic Research[17-52-53200]
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
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
Archive Date2017-06-28
WOS IDWOS:000408362700008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCATACLYSMIC VARIABLES ; STUNTED OUTBURSTS ; Z-CAMELOPARDALIS ; PG 0134+070 ; OLD NOVAE ; MODEL ; PISCIUM ; US-943 ; ALPHA ; STARS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11899
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 AuthorHan ZT(韩忠涛)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Sternberg Astronomical Institute, Moscow State University, Universitetskij prospect 13, Moscow 119992, Russia
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Han ZT,Qian SB,Voloshina, Irina,et al. Long-term photometric behavior of the eclipsing Z Cam-type dwarf nova AY Psc[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(6):56-65.
APA Han ZT,Qian SB,Voloshina, Irina,&Zhu LY.(2017).Long-term photometric behavior of the eclipsing Z Cam-type dwarf nova AY Psc.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(6),56-65.
MLA Han ZT,et al."Long-term photometric behavior of the eclipsing Z Cam-type dwarf nova AY Psc".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.6(2017):56-65.
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