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The Zwicky Transient Facility Catalog of Periodic Variable Stars
Chen,Xiaodian1; Wang,Shu1; Deng,Licai1; de Grijs,Richard2,3,4; Yang,Ming5; Tian,Hao6
2020-07-01
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume249Issue:1
AbstractAbstract The number of known periodic variables has grown rapidly in recent years. Thanks to its large field of view and faint limiting magnitude, the Zwicky Transient Facility (ZTF) offers a unique opportunity to detect variable stars in the northern sky. Here, we exploit ZTF Data Release 2 (DR2) to search for and classify variables down to r?~?20.6 mag. We classify 781,602 periodic variables into 11 main types using an improved classification method. Comparison with previously published catalogs shows that 621,702 objects (79.5%) are newly discovered or newly classified, including ~700 Cepheids, ~5000 RR Lyrae stars, ~15,000 δ Scuti variables, ~350,000 eclipsing binaries, ~100,000 long-period variables, and about 150,000 rotational variables. The typical misclassification rate and period accuracy are on the order of 2% and 99%, respectively. 74% of our variables are located at Galactic latitudes, . This large sample of Cepheids, RR Lyrae, δ Scuti stars, and contact (EW-type) eclipsing binaries is helpful to investigate the Galaxy’s disk structure and evolution with an improved completeness, areal coverage, and age resolution. Specifically, the northern warp and the disk’s edge at distances of 15–20 kpc are significantly better covered than previously. Among rotational variables, RS Canum Venaticorum and BY Draconis-type variables can be separated easily. Our knowledge of stellar chromospheric activity would benefit greatly from a statistical analysis of these types of variables.
KeywordPeriodic variable stars Pulsating variable stars Cepheid variable stars RR Lyrae variable stars Delta Scuti variable stars Long period variable stars Mira variable stars Eclipsing binary stars Galaxy structure Distance indicators
DOI10.3847/1538-4365/ab9cae
Language英语
WOS IDIOP:0067-0049-249-1-ab9cae
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/63358
Collection中国科学院国家天文台
Affiliation1.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China chenxiaodian@nao.cas.cn
2.Department of Physics and Astronomy, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia
3.Research Centre for Astronomy, Astrophysics and Astrophotonics, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia
4.International Space Science Institute–Beijing, 1 Nanertiao, Zhongguancun, Hai Dian District, Beijing 100190, People's Republic of China
5.IAASARS, National Observatory of Athens, Vas. Pavlou & I. Metaxa, Penteli 15236, Greece
6.CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Chen,Xiaodian,Wang,Shu,Deng,Licai,et al. The Zwicky Transient Facility Catalog of Periodic Variable Stars[J]. The Astrophysical Journal Supplement Series,2020,249(1).
APA Chen,Xiaodian,Wang,Shu,Deng,Licai,de Grijs,Richard,Yang,Ming,&Tian,Hao.(2020).The Zwicky Transient Facility Catalog of Periodic Variable Stars.The Astrophysical Journal Supplement Series,249(1).
MLA Chen,Xiaodian,et al."The Zwicky Transient Facility Catalog of Periodic Variable Stars".The Astrophysical Journal Supplement Series 249.1(2020).
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