Gaia calibrated UV luminous stars in LAMOST

被引：0

作者：

Yu Bai ^{[1
]}

Ji-Feng Liu ^{[1
,2
]}

Song Wang ^{[1
]}

机构：

[1] Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences

[2] College of Astronomy and Space Sciences, University of Chinese Academy of Sciences

来源：

Research in Astronomy and Astrophysics | 2018年 / 18卷 / 12期

基金：

中国国家自然科学基金;

关键词：

stars:activity; stars:general; ultraviolet:stars;

D O I：

暂无

中图分类号：

P152 [恒星天文学、星系天文学];

学科分类号：

摘要：

We take advantage of Gaia Data Release 2 to present 275 and 1774 ultraviolet luminous stars in the far ultraviolet(FUV) and near ultraviolet(NUV), respectively.These stars exceed their expected values by 5σ with respect to over one million ultraviolet stars in the log g vs.Teffdiagram.Galactic extinction is corrected with a 3 D dust map.In order to limit the Lutz-Kelker bias to an insignificant level, we select stars with relative uncertainties in luminosity less than 40% and trigonometric parallaxes less than 20%.We cross-identified our sample with the catalogs of RR Lyr stars and possible white dwarf main-sequence binaries, and find they compose ～62% and ～16% of our sample in the FUV and NUV, respectively.This catalog provides a unique sample to study stellar activity, spectrally unresolved compact main-sequence binaries and variable stars.

引用

页码：125 / 132

页数：8

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