Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry

doi:10.3847/1538-4357/ab0e83

CORC > 上海天文台 > 中国科学院上海天文台

	Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry
	Xu,Shuangjing 2,3; Zhang,Bo2 ; Reid,Mark J.1; Zheng,Xingwu 4; Wang,Guangli2,3
刊名	The Astrophysical Journal
	2019-04-22
卷号	875 期号:2
关键词	astrometry parallaxes stars: distances
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab0e83
英文摘要	Abstract We compare the parallaxes of stars from VLBI astrometry in the literature to those in the Gaia DR2 catalog. Our full sample contains young stellar objects, evolved AGB stars, pulsars, and other radio stars. Excluding AGB stars, which show significant discrepancies between Gaia and VLBI parallaxes, and stars in binary systems, we obtain an average, systematic, parallax offset of ?75?±?29 μas for Gaia DR2, consistent with their estimate of a parallax zero-point between ?100 and 0 μas.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-875-2-AB0E83
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/31813]
专题	中国科学院上海天文台
作者单位	1.Center for Astrophysics ∣?Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA 2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China; zb@shao.ac.cn 3.University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, People's Republic of China 4.School of Astronomy and Space Science, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
推荐引用方式 GB/T 7714	Xu,Shuangjing,Zhang,Bo,Reid,Mark J.,et al. Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry[J]. The Astrophysical Journal,2019,875(2).
APA	Xu,Shuangjing,Zhang,Bo,Reid,Mark J.,Zheng,Xingwu,&Wang,Guangli.(2019).Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry.The Astrophysical Journal,875(2).
MLA	Xu,Shuangjing,et al."Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry".The Astrophysical Journal 875.2(2019).