91 citations · 498 across the 20 of their papers we have counts for
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Precise Ages of Field Stars From White Dwarf Companions in Gaia DR2
Dan Qiu, Hai-Jun Tian, Xi-Dong Wang +5
We analyze 4\,050 wide binary star systems involving a white dwarf (WD) and usually a main sequence (MS) star, drawn from the large sample assembled by \citet[][hereafter, T20]{Tia…
Discovery of a young stellar "snake" with two dissolving cores in the solar neighborhood
Hai-Jun Tian
We report the discovery of a young (only 30-40\,Myr) snake-like structure (dubbed a stellar "snake") in the solar neighborhood from {\it Gaia} DR2. The average distance of this str…
Constraints on the assembly history of the Milky Way's smooth, diffuse stellar halo from the metallicity-dependent, radially-dominated velocity anisotropy profiles probed with K giants and BHB stars using LAMOST, SDSS/SEGUE, and Gaia
Sarah A. Bird, Xiang-Xiang Xue, Chao Liu +5
We analyze the anisotropy profile of the Milky Way's smooth, diffuse stellar halo using SDSS/SEGUE blue horizontal branch stars and SDSS/SEGUE and LAMOST K giants. These intrinsica…
The extended Gaia-PS1-SDSS (GPS1+) proper motion catalog
Hai-Jun Tian, Yang Xu, Chao Liu +3
The GPS1 catalog was released in 2017. It delivered precise proper motions for around 350 million sources across three-fourths of the sky down to a magnitude of \,mag. In…