347 citations · 3.9k across the 113 of their papers we have counts for
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Toward precise constraints on growth of massive black holes
Qingjuan Yu, Youjun Lu
Growth of massive black holes (MBHs) in galactic centers comes mainly from gas accretion during their QSO/AGN phases. In this paper we apply an extended Soltan argument, connecting…
Hypervelocity binary stars: smoking gun of massive binary black holes
Youjun Lu, Qingjuan Yu, D. N. C. Lin
The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or be…
On the origin of kinematic distribution of the sub-parsec young stars in the Galactic center
Qingjuan Yu, Youjun Lu, D. N. C. Lin
Within a half-parsec from the Galactic center (GC), there is a population of coeval young stars which appear to reside in a coherent disk. Surrounding this dynamically-cool stellar…
A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
Hongyan Zhou, Tinggui Wang, Weimin Yuan +4
This is the first paper in a series dedicated to the study of the emission-line and continuum properties of narrow line Seyfert 1 galaxies (NLS1s). We carried out a systematic sear…
Evidence for a population of beamed radio intermediate quasars
Tinggui Wang, Hongyan Zhou, Junxian Wang +2
Whether radio intermediate quasars possess relativistic jets as radio-loud quasars is an important issue in the understanding of the origin of radio emission in quasars. In this le…
Probing the precession of the inner accretion disk in Cygnus X-1
Diego F. Torres, Gustavo E. Romero, Xavier Barcons +1
We show that changes in the orientation of the inner accretion disk of Cygnus X-1 affect the shape of the broad Fe K emission line emitted from this object, in such a way that e…