ESTIMATION OF DISTANCES TO STARS WITH STELLAR PARAMETERS FROM LAMOST

	ESTIMATION OF DISTANCES TO STARS WITH STELLAR PARAMETERS FROM LAMOST
	Carlin, Jeffrey L.1,2; Liu, Chao3 ; Newberg, Heidi Jo 1; Beers, Timothy C.4,5; Chen, Li 6; Deng, Licai3 ; Guhathakurta, Puragra 7; Hou, Jinliang 8; Hou, Yonghui 6; Lepine, Sebastien 9
刊名	ASTRONOMICAL JOURNAL
	2015-07-01
卷号	150 期号:1
关键词	Galaxy: stellar content Galaxy: structure stars: distances surveys
英文摘要	We present a method to estimate distances to stars with spectroscopically derived stellar parameters. The technique is a Bayesian approach with likelihood estimated via comparison of measured parameters to a grid of stellar isochrones, and returns a posterior probability density function for each star's absolute magnitude. This technique is tailored specifically to data from the Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) survey. Because LAMOST obtains roughly 3000 stellar spectra simultaneously within each similar to 5 degrees diameter "plate" that is observed, we can use the stellar parameters of the observed stars to account for the stellar luminosity function and target selection effects. This removes biasing assumptions about the underlying populations, both due to predictions of the luminosity function from stellar evolution modeling, and from Galactic models of stellar populations along each line of sight. Using calibration data of stars with known distances and stellar parameters, we show that our method recovers distances for most stars within similar to 20%, but with some systematic overestimation of distances to halo giants. We apply our code to the LAMOST database, and show that the current precision of LAMOST stellar parameters permits measurements of distances with similar to 40% error bars. This precision should improve as the LAMOST data pipelines continue to be refined.
收录类别	SCI
语种	英语
WOS记录号	WOS:000357744400004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5662]
专题	国家天文台_光学天文研究部
作者单位	1.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA 2.Earlham Coll, Dept Phys & Astron, Richmond, IN 47374 USA 3.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 4.Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA 5.Univ Notre Dame, Joint Inst Nucl Astrophys, Notre Dame, IN 46556 USA 6.Shanghai Astron Observ, Shanghai 200030, Peoples R China 7.Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, Santa Cruz, CA 95064 USA 8.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Peoples R China 9.Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA 10.Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
推荐引用方式 GB/T 7714	Carlin, Jeffrey L.,Liu, Chao,Newberg, Heidi Jo,et al. ESTIMATION OF DISTANCES TO STARS WITH STELLAR PARAMETERS FROM LAMOST[J]. ASTRONOMICAL JOURNAL,2015,150(1).
APA	Carlin, Jeffrey L..,Liu, Chao.,Newberg, Heidi Jo.,Beers, Timothy C..,Chen, Li.,...&Zheng, Zheng.(2015).ESTIMATION OF DISTANCES TO STARS WITH STELLAR PARAMETERS FROM LAMOST.ASTRONOMICAL JOURNAL,150(1).
MLA	Carlin, Jeffrey L.,et al."ESTIMATION OF DISTANCES TO STARS WITH STELLAR PARAMETERS FROM LAMOST".ASTRONOMICAL JOURNAL 150.1(2015).