306 citations · 791 across the 18 of their papers we have counts for
18 papers
X-ray spectral correlations in a sample of Low-mass black hole X-ray binaries in the hard state
Bei You, Yanting Dong, Zhen Yan +4
The power-law emission and reflection component provide valuable insights into the accretion process around a black hole. In this work, thanks to the broadband spectra coverage of…
Deciphering the extreme X-ray variability of the nuclear transient eRASSt J045650.3-203750: A likely repeating partial tidal disruption event
Zhu Liu, A. Malyali, M. Krumpe +17
(Abridged) In this paper, we present the results of an exceptional repeating X-ray nuclear transient, eRASSt J045650.3-203750 (hereafter J0456-20), uncovered by SRG/eROSITA in a qu…
Discovery of a new supergiant fast X-ray transient MAXI J0709-159 associated with the Be star LY CMa
Mutsumi Sugizaki, Tatehiro Mihara, Kohei Kobayashi +10
We report on the discovery of a new supergiant fast X-ray transient (SFXT), MAXI J0709159, and its identification with LY CMa (also known as HD 54786). On 2022 January 25, a new…
Analysis of the reflection spectra of MAXI J1535-571 in the hard and intermediate states
Yanting Dong, Zhu Liu, Youli Tuo +4
We report results on the joint-fit of the NuSTAR and HXMT data for the black hole X-ray binary candidate MAXI J1535-571. The observations were obtained in 2017 when the source evol…
Luminosity function and event rate density of XMM-Newton-selected supernova shock-breakout candidates
Hui Sun, He-Yang Liu, Hai-Wu Pan +6
A dozen X-ray supernova shock breakout (SN SBO) candidates were reported recently based on XMM-Newton archival data, which increased the X-ray selected SN SBO sample by an order of…
Insight-HXMT observations of jet-like corona in a black hole X-ray binary MAXI J1820+070
Bei You, Yuoli Tuo, Chengzhe Li +123
A black hole X-ray binary produces hard X-ray radiation from its corona and disk when the accreting matter heats up. During an outburst, the disk and corona co-evolves with each ot…
Magnetic-reconnection-heated corona in active galactic nuclei: refined disc-corona model and application to broad-band radiation
Huaqing Cheng, B. F. Liu, Jieying Liu +3
A long-standing question in active galactic nucleus (AGN) research is how the corona is heated up to produce X-ray radiation much stronger than that arising from the viscous heatin…
A Tidal Disruption Event Candidate Discovered in the Active Galactic Nucleus SDSS J022700.77-042020.6
Zhu Liu, Dongyue Li, He-Yang Liu +4
We report the discovery of a Tidal Disruption Event (TDE) candidate occurring in the Active Galactic Nucleus SDSS J022700.77-042020.6. A sudden increase in flux of J0227-0420 durin…
A detailed study on the reflection component for the Black Hole Candidate MAXI J1836-194
Yanting Dong, Javier A. García, Zhu Liu +3
We present a detailed spectral analysis of the black hole candidate MAXI J1836-194. The source was caught in the intermediate state during its 2011 outburst by Suzaku and RXTE. We…
The Large Amplitude X-ray Variability in NGC 7589: Possible Evidence for Accretion Mode Transition
Zhu Liu, He-Yang Liu, Huaqing Cheng +2
We report the discovery of large amplitude X-ray variability in the low luminosity AGN (LLAGN) MGC 7589, and present possible observational evidence for accretion mode transition i…
Effect of accreting tidally disrupted stars on the spin evolution of black holes
Xiaoxia Zhang, Youjun Lu, Zhu Liu
Accretion of tidally disrupted stars (TDSs) is expected to contribute significantly to the growth of massive black holes (MBHs) with mass in galactic centers.…
Probing AGN Inner Structure with X-ray Obscured Type 1 AGN
Teng Liu, Andrea Merloni, Jun-Xian Wang +9
Using the X-ray-selected active galactic nuclei (AGN) from the XMM-XXL north survey and the SDSS Baryon Oscillation Spectroscopic Survey (BOSS) spectroscopic follow-up of them, we…
Dependence of the broad Fe K line on the physical parameters of AGN
Zhu Liu, Weimin Yuan, Youjun Lu +3
In this paper, the dependence of the broad Fe K line on the physical parameters of AGN, such as the black hole mass , accretion rate (equivalently represented by Eddingt…
X-ray spectral properties of the AGN sample in the northern XMM-XXL field
Zhu Liu, Andrea Merloni, Antonis Georgakakis +7
In this paper we describe and publicly release a catalogue consisting of 8445 point-like X-ray sources detected in the XMM-XXL north survey. For the 2512 AGN which have reliable sp…
X-ray fluorescent lines from the Compton-thick AGN in M51
Weiwei Xu, Zhu Liu, Lijun Gou +1
The cold disk/torus gas surrounding active galactic nuclei (AGN) emits fluorescent lines when irradiated by hard X-ray photons. The fluorescent lines of elements other than Fe and…
Obscuration-dependent evolution of Active Galactic Nuclei
Johannes Buchner, Antonis Georgakakis, Kirpal Nandra +9
We aim to constrain the evolution of AGN as a function of obscuration using an X-ray selected sample of AGN from a multi-tiered survey including the CDFS, AEGIS-XD, COSM…
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…