CONTACT BINARIES AS VIABLE DISTANCE INDICATORS: NEW, COMPETITIVE (V)JHK(s) PERIOD-LUMINOSITY RELATIONS

	CONTACT BINARIES AS VIABLE DISTANCE INDICATORS: NEW, COMPETITIVE (V)JHK(s) PERIOD-LUMINOSITY RELATIONS
	Chen, Xiaodian 1,2,3; De Grijs, Richard 1,2,4; Deng, Licai3
刊名	ASTROPHYSICAL JOURNAL
	2016-12-01
卷号	832 期号:2
关键词	binaries: eclipsing open clusters and associations: general stars: distances
英文摘要	Based on the largest catalogs currently available, comprising 6090 contact binaries (CBs) and 2167 open clusters (OCs), we determine the near-infrared (NIR) JHK(s) CB period-luminosity (PL) relations, for the first time achieving the low levels of intrinsic scatter that make these relations viable as competitive distance calibrators. To firmly establish our distance calibration on the basis of OC CBs, we require that (i) the CB of interest must be located inside the core radius of its host cluster, (ii) the CB's proper motion must be located within the 2 sigma distribution of that of its host OC, and (iii) the CB's age, t, must be comparable to that of its host cluster, i.e., Delta log(t yr(-1)) < 0.3. We thus select a calibration sample of 66 CBs with either OC distances or accurate space-based parallaxes. The resulting NIR PL relations, for both late-type (i.e., W Ursae Majoris-type) and-for the first time-early-type CBs, are as accurate as the well-established JHK(s) Cepheid PL relations, (characterized by single-band statistical uncertainties of sigma < 0.10 mag). We show that CBs can be used as viable distance tracers, yielding distances with uncertainties of better than 5% for 90% of the 6090 CBs in our full sample. By combining the full JHK(s) photometric data set, CBs can trace distances with an accuracy, sigma = 0.05 (statistical) +/- 0.03 (systematic) mag. The 102 CBs in the Large Magellanic Cloud are used to determine a distance modulus to the galaxy of (m - MV)(0)(LMC) = 18.41 +/- 0.20 mag.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LARGE-MAGELLANIC-CLOUD ; GRAVITATIONAL LENSING EXPERIMENT ; OPEN CLUSTER NGC-6939 ; SKY AUTOMATED SURVEY ; VARIABLE-STARS ; CCD PHOTOMETRY ; INTERSTELLAR EXTINCTION ; ECLIPSING BINARIES ; SURROUNDING FIELD ; NGC 7044
收录类别	SCI
语种	英语
WOS记录号	WOS:000389049800009
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6838]
专题	国家天文台_光学天文研究部
作者单位	1.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, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China 4.Int Space Sci Inst Beijing, 1 Nanertiao, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Chen, Xiaodian,De Grijs, Richard,Deng, Licai. CONTACT BINARIES AS VIABLE DISTANCE INDICATORS: NEW, COMPETITIVE (V)JHK(s) PERIOD-LUMINOSITY RELATIONS[J]. ASTROPHYSICAL JOURNAL,2016,832(2).
APA	Chen, Xiaodian,De Grijs, Richard,&Deng, Licai.(2016).CONTACT BINARIES AS VIABLE DISTANCE INDICATORS: NEW, COMPETITIVE (V)JHK(s) PERIOD-LUMINOSITY RELATIONS.ASTROPHYSICAL JOURNAL,832(2).
MLA	Chen, Xiaodian,et al."CONTACT BINARIES AS VIABLE DISTANCE INDICATORS: NEW, COMPETITIVE (V)JHK(s) PERIOD-LUMINOSITY RELATIONS".ASTROPHYSICAL JOURNAL 832.2(2016).