66 citations · 353 across the 36 of their papers we have counts for
36 papers
Unveiling the nature of G6096: a likely hierarchical triple system
Yinghao Xu, Xinlin Zhao, Song Wang +10
G6096 (Gaia DR3 609651611028044544) was recently reported as a wide ( days) and eccentric () binary possibly hosting a massive white dwarf or neutron star. In…
Characterizing Orbital Parameters of Hot Subdwarf Binaries with Multiple Spectroscopic Surveys
XInlin Zhao, Song Wang, Zhenxin Lei +5
Hot subdwarfs (HSDs) provide critical insights into the physical mechanisms governing binary evolution. In this work, we conduct a systematic analysis of 157 HSDs, selected from Ga…
Nature of HD 251108: an RS CVn binary with a long-term evolving spot
Xinlin Zhao, Song Wang, B. Fuhrmeister +5
Recently, the Lobster Eye Imager for Astronomy (LEIA) detected the longest-lasting and most energetic stellar X-ray flare event from HD 251108. In this work, we re-determined the a…
Hydrodynamical simulation of wind production from hot accretion flows in tidal disruption events
Mingjun Liu, De-Fu Bu, Xiao-Hong Yang +5
Wind is a key mechanism for supermassive black hole (SMBH) feedback to their host galaxies. In tidal disruption events (TDEs), black holes spend most of their time accreting at hig…
Radiative cooling effects on black hole hot accretion flows around the sub-Bondi radius
Mu-Qing Liu, Xiao-Hong Yang, De-Fu Bu
It is difficult to implement numerical simulations on a region extending from the vicinity of a black hole to the Bondi radius. Most previous numerical simulations have primarily c…
Numerical Simulations of the Circularized Accretion Flow in Population III Star Tidal Disruption Events. II. Radiative Properties
Yu-Heng Sheng, De-Fu Bu, Liang Chen +3
Tidal Disruption Events (TDEs) release enormous amounts of energy, offering a promising avenue for detecting Population III (Pop III) stars. However, the radiative properties of TD…
Numerical simulations of cold clumps in the hot accretion flows around black holes
Na-Duo Liu, Yu-Heng Sheng, De-Fu Bu +3
Previous numerical simulations have shown that cold clumps can form within hot accretion flows, offering insights into the detailed processes of the state transition in black hole…
Numerical Simulations of the Circularized Accretion Flow in Population III Star Tidal Disruption Events. I. The Accretion Flow and the Wind
Yu-Heng Sheng, De-Fu Bu, Xiao-Hong Yang +2
Tidal Disruption Events (TDEs) have recently been proposed as potential probes for Population III stars. However, the properties of the accretion flow and the wind from the Pop III…
Line-force driven wind from a thin disk in tidal disruption event
De-Fu Bu, Xiao-Hong Yang, Liang Chen +2
Winds from the accretion disk in tidal disruption events (TDEs) play a key role in determining the radiation of TDEs. The winds from the super-Eddington accretion phase in TDEs hav…
Numerical simulations of the line-force-driven winds from active galactic nuclei: The special relativistic effects
Luobin Tang, Xiaohong Yang, Defu Bu
Ultra-fast outflows (UFOs) with mildly relativistic velocities are frequently observed in active galactic nuclei (AGNs). The line-force-driving mechanism is often taken as a potent…
Time-dependent global simulations of a thin accretion disc: the effects of magnetically-driven winds on thermal instability
Yu Zhao, Xiao-Hong Yang, Li Xue +1
According to the standard thin disc theory, it is predicted that the radiation-pressure-dominated inner region of a thin disc is thermally unstable, while observations suggest that…
Radiative hydrodynamical simulations of super-Eddington accretion flow in tidal disruption event: the accretion flow and wind
De-Fu Bu, Erlin Qiao, Xiao-Hong Yang
One key question in tidal disruption events theory is that how much of the fallback debris can be accreted to the black hole. Based on radiative hydrodynamic simulations, we study…
Radio emission of tidal disruption events from wind-cloud interaction
De-Fu Bu, Liang Chen, Guobin Mou +2
Winds can be launched in tidal disruption event (TDE). It has been proposed that the winds can interact with the cloud surrounding the black hole, produce bow shocks, accelerate el…
Effect of radiation drag on the line-force-driven winds
Bei-Chuan Wang, Xiao-Hong Yang, De-Fu Bu +1
Ultra-fast outflows (UFOs) with mildly relativistic velocities are measured using the X-ray spectra of radio-quiet and -loud active galactic nuclei (AGNs). In general, UFOs are bel…
The origin of the optical/ultraviolet emission of optical/ultraviolet tidal disruption events
De-Fu Bu, Erlin Qiao, Xiao-Hong Yang +1
One of the most prominent problems of optical/ultraviolet (UV) tidal disruption events (TDEs) is the origin of their optical/UV emission. It has been proposed that the soft X-rays…
Large-scale Dynamics of Winds Driven by Line Force from a Thin Accretion Disk
Yi Zhu, De-Fu Bu, Xiao-Hong Yang +2
Winds play a significant role in active galactic nuclei feedback process. Previous simulations studying winds only focus on a small dynamical range. Therefore, it is unknown how fa…
Magnetohydrodynamic winds driven by line force from the standard thin disk around supermassive black holes: II. a possible model for ultra-fast outflows in radio-loud AGNs
Xiao-Hong Yang
In radio-loud active galactic nuclei (AGNs), ultra-fast outflows (UFOs) were detected at the inclination angle of -- away from jets. Except for the incl…
Can warm absorbers be driven by ultra-fast outflows?
De-Fu Bu, Xiao-Hong Yang
Warm absorbers (WAs) located approximately in the region of parsecs are common phenomena in many active galactic nuclei (AGNs). The driving mechanism of WAs is still under…
Dynamical and thermal properties of the parsec-scale gases spherically accreted onto low luminous active galactic nuclei
Han-Wen Sun, Xiao-Hong Yang
We analytically study the dynamical and thermal properties of the optically-thin gases at the parsec-scale when they are spherically accreted onto low luminous active galactic nucl…
Magnetohydrodynamic Winds Driven by the Line Force from the Standard Thin Disk around Supermassive Black Holes. I. The Case of Weak Magnetic Field
Xiao-Hong Yang, Kamarjan Ablimit, Qi-Xiu Li
Absorption lines with high blue-shifted velocities are frequently found in the ultraviolet (UV) and X-ray spectra of luminous active galactic nuclei (AGNs). This implies that high-…
Gas flows in an Active galactic nuclei. I. Two-phase gas inflow
De-Fu Bu, Xiao-Hong Yang, Bocheng Zhu
We perform two-dimensional hydrodynamic simulations to study the non-rotating gas flow in the region from 1-1000 parsec. This region connects the galaxy scale and the accretion dis…
Two-temperature radiative hot accretion flow around neutron stars
De-Fu Bu, Erlin Qiao, Xiao-Hong Yang
Numerical simulations of radiative two-temperature hot accretion flows (HAFs) around Neutron stars (NSs) are performed. We assume that all of the energy carried by the HAF around a…
Magnetohydrodynamic numerical simulation of the outflows driven by magnetic field and radiation force from the corona above a thin disk
Xiao-Hong Yang, De-Fu Bu, Qi-Xiu Li
A hot corona is suggested to be above the standard thin disk. The anisotropy of hard X-ray emission in radio-quiet active galactic nuclei implies that the corona is not static and…
Active galactic nuclei feedback at parsec scale
De-Fu Bu, Xiao-Hong Yang
We perform simulations to study the effects of active galactic nuclei (AGNs) radiation and wind feedback on the properties of slowly rotating accretion flow at parsec scale. We fin…