200 citations · 759 across the 13 of their papers we have counts for
4 papers · 1 filter
Non-interacting black hole binaries with Gaia and LAMOST
Grzegorz Wiktorowicz, Youjun Lu, Łukasz Wyrzykowski +4
Until recently, black holes (BHs) could be discovered only through accretion from other stars in X-ray binaries, or in merging double compact objects. Improvements in astrometric a…
Time-Variable Aluminum Absorption in the Polar AR Ursae Majoris, and an Updated Estimate for the Mass of the White Dwarf
Yu Bai, Stephen Justham, JiFeng Liu +3
We present spectra of the extreme polar AR Ursae Majoris (AR UMa) which display a clear Al I absorption doublet, alongside spectra taken less than a year earlier in which that feat…
Relativistic baryonic jets from an ultraluminous supersoft X-ray source
Ji-Feng Liu, Yu Bai, Song Wang +10
The formation of relativistic jets by an accreting compact object is one of the fundamental mysteries of astrophysics. While the theory is poorly understood, observations of relati…
Puzzling accretion onto a black hole in the ultraluminous X-ray source M101 ULX-1
Jifeng Liu, Joel N. Bregman, Yu Bai +2
There are two proposed explanations for ultraluminous X-ray sources (ULXs) with luminosities in excess of erg s. They could be intermediate-mass black holes (more…