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pro vyhledávání: '"Yang, Xiao Hong"'
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 it is common for a thin disc of more than 0.01 Eddington luminosity t
Externí odkaz:
http://arxiv.org/abs/2309.06939
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 this issue for efficiently `circularized' debris accretion flow. We fi
Externí odkaz:
http://arxiv.org/abs/2306.04313
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 electrons, and produce radio emission. We restudy the wind-cloud interac
Externí odkaz:
http://arxiv.org/abs/2303.10817
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 produced by the stellar debris accretion disk can be reprocessed into
Externí odkaz:
http://arxiv.org/abs/2208.04118
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 believed to be generated from the accretion disk around a black hole (BH)
Externí odkaz:
http://arxiv.org/abs/2208.01210
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 far the winds can go and what the properties of the winds will be if the
Externí odkaz:
http://arxiv.org/abs/2204.07296
Autor:
Bu, De-Fu, Yang, Xiao-Hong
Warm absorbers (WAs) located approximately in the region of $1-1000$ parsecs are common phenomena in many active galactic nuclei (AGNs). The driving mechanism of WAs is still under debate. Ultra-fast outflows (UFOs) which are launched very close to t
Externí odkaz:
http://arxiv.org/abs/2111.04221
Autor:
Yang, Xiao-Hong
In radio-loud active galactic nuclei (AGNs), ultra-fast outflows (UFOs) were detected at the inclination angle of $\sim10^{\rm o}$--$70^{\rm o}$ away from jets. Except for the inclination angle of UFOs, the UFOs in radio-loud AGNs have similar proper
Externí odkaz:
http://arxiv.org/abs/2110.10954
Publikováno v:
In Heliyon 30 May 2024 10(10)
Autor:
Sun, Han-Wen, Yang, Xiao-Hong
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 nuclei (LLAGNs). The falling gases are irradiated by the central X-ray rad
Externí odkaz:
http://arxiv.org/abs/2106.01640