PMO OpenIR
PHYSICAL PARAMETER STUDY OF EIGHT W URSAE MAJORIS-TYPE CONTACT BINARIES IN NGC 188
Chen, Xiaodian1,2,3; Deng, Licai3; De Grijs, Richard1,2,4; Zhang, Xiaobin3; Xin, Yu3; Wang, Kun3,5; Luo, Changqing3; Yan, Zhengzhou3,5; Tian, Jianfeng3; Sun, Jinjiang6; Liu, Qili6; Zhou, Qiang6; Luo, Zhiquan5
2016-11-01
Source PublicationASTRONOMICAL JOURNAL
ISSN0004-6256
Volume152Issue:5Pages:13
Corresponding AuthorChen, Xiaodian(chenxiaodian1989@163.com)
AbstractWe used the newly commissioned 50 cm Binocular Network telescope at Qinghai Station of Purple Mountain Observatory (Chinese Academy of Sciences) to observe the old open cluster NGC 188 in V and R as part of a search for variable objects. Our time-series data span a total of 36 days. Radial velocity and proper-motion selection resulted in a sample of 532 genuine cluster members. Isochrone fitting was applied to the cleaned cluster sequence, yielding a distance modulus of (m - M)(V)(0) = 11.35 +/- 0.10 mag and a total foreground reddening of E(V - R) = 0.062 +/- 0.002 mag. Light-curve solutions were obtained for eight W Ursae Majoris eclipsing. binary systems (W UMas), and their orbital parameters were estimated. Using the latter parameters, we estimate a distance to the W UMas that is independent of the host cluster's physical properties. Based on combined fits to six of the W UMas (EP Cep, EQ Cep, ES Cep, V369 Cep, and-for the first time-V370 Cep and V782 Cep), we obtain an average distance modulus of (m - M)(V)(0) = 11.31 +/- 0.08 mag, which is comparable to. that resulting from our isochrone fits. These six W UMas exhibit an obvious period-luminosity relation. We derive more accurate physical parameters for the W UMa systems and discuss their initial masses and ages. The former show that these W UMa systems have likely undergone angular. momentum evolution within a convective envelope (W-type evolution). The ages of the W UMa systems agree well with the cluster's age.
Keywordbinaries: eclipsing methods: data analysis open clusters and associations: individual (NGC 188, Berkeley 39) stars: distances
DOI10.3847/0004-6256/152/5/129
WOS KeywordWIYN OPEN CLUSTER ; OLD OPEN CLUSTERS ; VARIABLE-STARS ; LUMINOSITY-RELATION ; ECLIPSING BINARIES ; CCD PHOTOMETRY ; LIGHT CURVES ; BERKELEY 39 ; NGC-188 ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000403827800005
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22944
Collection中国科学院紫金山天文台
Corresponding AuthorChen, Xiaodian
Affiliation1.Peking Univ, Kavli Inst Astron & Astrophys, Yi He Yuan Lu 5, Beijing 100871, Peoples R China
2.Peking Univ, Dept Astron, Yi He Yuan Lu 5, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
4.Int Space Sci Inst Beijing, 1 Nanertiao, Beijing 100190, Peoples R China
5.China West Normal Univ, Sch Phys & Elect Informat, Nanchong 637002, Peoples R China
6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xiaodian,Deng, Licai,De Grijs, Richard,et al. PHYSICAL PARAMETER STUDY OF EIGHT W URSAE MAJORIS-TYPE CONTACT BINARIES IN NGC 188[J]. ASTRONOMICAL JOURNAL,2016,152(5):13.
APA Chen, Xiaodian.,Deng, Licai.,De Grijs, Richard.,Zhang, Xiaobin.,Xin, Yu.,...&Luo, Zhiquan.(2016).PHYSICAL PARAMETER STUDY OF EIGHT W URSAE MAJORIS-TYPE CONTACT BINARIES IN NGC 188.ASTRONOMICAL JOURNAL,152(5),13.
MLA Chen, Xiaodian,et al."PHYSICAL PARAMETER STUDY OF EIGHT W URSAE MAJORIS-TYPE CONTACT BINARIES IN NGC 188".ASTRONOMICAL JOURNAL 152.5(2016):13.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, Xiaodian]'s Articles
[Deng, Licai]'s Articles
[De Grijs, Richard]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, Xiaodian]'s Articles
[Deng, Licai]'s Articles
[De Grijs, Richard]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, Xiaodian]'s Articles
[Deng, Licai]'s Articles
[De Grijs, Richard]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.