DISTANCE-DEPENDENT OFFSETS BETWEEN PARALLAXES FOR NEARBY STARS AND GAIA DR1 PARALLAXES

被引：10

作者：

Jao, Wei-Chun ^{[1
]}

Henry, Todd J. ^{[2
]}

Riedel, Adric R. ^{[3
]}

Winters, Jennifer G. ^{[4
]}

Slatten, Kenneth J. ^{[2
]}

Gies, Douglas R. ^{[1
]}

机构：

[1] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30302 USA

[2] RECONS Inst, Chambersburg, PA 17201 USA

[3] CALTECH, Dept Astron, Pasadena, CA 91125 USA

[4] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 832卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

astrometry; solar neighborhood; stars: distances; NAVAL OBSERVATORY PARALLAXES; COLOR CLASS-M; PHOTOMETRIC PARALLAXES; SOLAR NEIGHBORHOOD; PROPER MOTIONS; NLTT-CATALOG; DWARF; PROGRAM; SAMPLE; +45-DEGREES;

D O I：

10.3847/2041-8205/832/1/L18

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use 612 single stars with previously published trigonometric parallaxes placing them within 25 pc to evaluate parallaxes released in Gaia's first data release (DR1). We find that the Gaia parallaxes are, on average, 0.24 +/- 0.02 mas smaller than the weighted mean trigonometric parallax values for these stars in the solar neighborhood. We also find that the offset changes with distance out to 100 pc, in the sense that the closer the star, the larger the offset. We find no systematic trends in the parallax offsets with stellar V magnitude, V - K color, or proper motion. We do find that the offset is roughly twice as large for stars south of the ecliptic compared to those that are north.

引用

页数：6

共 31 条

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