The Near-infrared Optimal Distances Method Applied to Galactic Classical Cepheids Tightly Constrains Mid-infrared Period-Luminosity Relations

doi:10.3847/1538-4357/aa9d99

	The Near-infrared Optimal Distances Method Applied to Galactic Classical Cepheids Tightly Constrains Mid-infrared Period-Luminosity Relations
	de Grijs, Richard 1,2,4; Deng, Licai3 ; Wang, Shu 4; Chen, Xiaodian 3
刊名	ASTROPHYSICAL JOURNAL
	2018-01-10
卷号	852 期号:2
关键词	Distance Scale Infrared: Ism Dust Stars: Variables: Cepheids Extinction
DOI	10.3847/1538-4357/aa9d99
文献子类	Article
英文摘要	Classical Cepheids are well-known and widely used distance indicators. As distance and extinction are usually degenerate, it is important to develop suitable methods to robustly anchor the distance scale. Here, we introduce a near-infrared optimal distance method to determine both the extinction values of and distances to a large sample of 288 Galactic classical Cepheids. The overall uncertainty in the derived distances is less than 4.9%. We compare our newly determined distances to the Cepheids in our sample with previously published distances to the same Cepheids with Hubble Space Telescope parallax measurements and distances based on the IR surface brightness method, Wesenheit functions, and the main-sequence fitting method. The systematic deviations in the distances determined here with respect to those of previous publications is less than 1%-2%. Hence, we constructed Galactic mid-IR period-luminosity (PL) relations for classical Cepheids in the four Wide-Field Infrared Survey Explorer (WISE) bands (W1, W2, W3, and W4) and the four Spitzer Space Telescope bands ([3.6], [4.5], [5.8], and [8.0]). Based on our sample of hundreds of Cepheids, the WISE PL relations have been determined for the first time; their dispersion is approximately 0.10 mag. Using the currently most complete sample, our Spitzer PL relations represent a significant improvement in accuracy, especially in the [3.6] band which has the smallest dispersion (0.066 mag). In addition, the average mid-IR extinction curve for Cepheids has been obtained: A(W1)/A(Ks) approximate to 0.560, A(W2)/A(Ks) approximate to 0.479, A(W3)/A(Ks) approximate to 0.507, A(W4)/A(Ks) approximate to 0.406, A([3.6]) A(Ks) approximate to 0.481, A([4.5])/A(Ks) approximate to 0.469, A([5.8])/A(Ks) approximate to 0.427, and A([8.0])/A(Ks) approximate to 0.427 mag
WOS关键词	INTERSTELLAR EXTINCTION LAW ; LARGE-MAGELLANIC-CLOUD ; BAADE-WESSELINK DISTANCES ; K-S BANDS ; 8.0 MU-M ; MILKY-WAY ; ARCHIVAL DATA ; SCALE ; CALIBRATION ; PARALLAXES
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000419796100005
资助机构	Initiative Postdocs Support Program(BX201600002) ; Initiative Postdocs Support Program(BX201600002) ; China Postdoctoral Science Foundation(2017M610998) ; China Postdoctoral Science Foundation(2017M610998) ; KIAA ; KIAA ; National Natural Science Foundation of China(U1631102 ; National Natural Science Foundation of China(U1631102 ; 11373010 ; 11373010 ; 11633005) ; 11633005) ; Initiative Postdocs Support Program(BX201600002) ; Initiative Postdocs Support Program(BX201600002) ; China Postdoctoral Science Foundation(2017M610998) ; China Postdoctoral Science Foundation(2017M610998) ; KIAA ; KIAA ; National Natural Science Foundation of China(U1631102 ; National Natural Science Foundation of China(U1631102 ; 11373010 ; 11373010 ; 11633005) ; 11633005)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20318]
专题	国家天文台_光学天文研究部
作者单位	1.Int Space Sci Inst Beijing, Beijing 100190, Peoples R China 2.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	de Grijs, Richard,Deng, Licai,Wang, Shu,et al. The Near-infrared Optimal Distances Method Applied to Galactic Classical Cepheids Tightly Constrains Mid-infrared Period-Luminosity Relations[J]. ASTROPHYSICAL JOURNAL,2018,852(2).
APA	de Grijs, Richard,Deng, Licai,Wang, Shu,&Chen, Xiaodian.(2018).The Near-infrared Optimal Distances Method Applied to Galactic Classical Cepheids Tightly Constrains Mid-infrared Period-Luminosity Relations.ASTROPHYSICAL JOURNAL,852(2).
MLA	de Grijs, Richard,et al."The Near-infrared Optimal Distances Method Applied to Galactic Classical Cepheids Tightly Constrains Mid-infrared Period-Luminosity Relations".ASTROPHYSICAL JOURNAL 852.2(2018).