69 citations · 204 across the 7 of their papers we have counts for
10 papers
Detection of a possible X-ray Quasi-periodic Oscillation in the Active Galactic Nucleus 1H~0707-495
Hai-Wu Pan, Weimin Yuan, Su Yao +4
Quasi-periodic oscillation (QPO) detected in the X-ray radiation of black hole X-ray binaries (BHXBs) is thought to originate from dynamical processes in the close vicinity of the…
Universal scaling of the 3:2 twin-peak quasi-periodic oscillation frequencies with black hole mass and spin revisited
Xin-Lin Zhou, Weimin Yuan, Hai-Wu Pan +1
We discuss further observational support of an idea formulated a decade ago by Abramowicz, Klu{ź}niak, McClintock and Remillard. They demonstrated that the 3:2 pairs of frequencies…
Relativistic Fe K Line Revealed in the Composite X-ray Spectrum of Narrow Line Seyfert 1 Galaxies --- do their black holes have averagely low or intermediate spins?
Zhu Liu, Weimin Yuan, Youjun Lu +1
While a broad profile of the Fe K emission line is frequently found in the X-ray spectra of typical Seyfert galaxies, the situation is unclear in the case of Narrow Line Seyfert…
On the Black Hole Masses In Ultra-luminous X-ray Sources
Xin-Lin Zhou
Ultra-luminous X-ray sources (ULXs) are off-nuclear X-ray sources in nearby galaxies with X-ray luminosities 10 erg s. The measurement of the black hole (BH) m…
The LAMOST Survey of Background Quasars in the Vicinity of the Andromeda and Triangulum Galaxies -- II. Results from the Commissioning Observations and the Pilot Surveys
Zhi-Ying Huo, Xiao-Wei Liu, Mao-Sheng Xiang +68
We present new quasars discovered in the vicinity of the Andromeda and Triangulum galaxies with the LAMOST during the 2010 and 2011 observational seasons. Quasar candidates are sel…
Black hole masses from X-rays
Xin-Lin Zhou, Roberto Soria
We discuss two methods to estimate black hole (BH) masses using X-ray data only: from the X-ray variability amplitude and from the photon index Gamma. The first method is based on…