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NuSTAR Hard X-ray View of Low-luminosity Active Galactic Nuclei: High-energy Cutoff and Truncated Thin Disk
George Younes, Andrew Ptak, Luis C. Ho +5
We report the analysis of simultaneous XMM-Newton+NuSTAR observations of two low-luminosity Active Galactic Nuclei (LLAGN), NGC 3998 and NGC 4579. We do not detect any significant…
New Clues to Jet Launching: The inner disks in radio loud quasars may be more stable
Zhen-Yi Cai, Yu-Han Sun, Jun-Xian Wang +3
Jet launching in radio loud (RL) quasars is one of the fundamental problems in astrophysics. Exploring the differences in the inner accretion disk properties between RL and radio q…
An intrinsic link between long-term UV/optical variations and X-ray loudness in quasars
Wen-yong Kang, Jun-Xian Wang, Zhen-Yi Cai +5
Observations have shown that UV/optical variation amplitude of quasars depend on several physi- cal parameters including luminosity, Eddington ratio, and likely also black hole mas…
MACER improved: AGN feedback computed in rotating early-type galaxies at high resolution
Zhaoming Gan, Luca Ciotti, Jeremiah P. Ostriker +1
Based on our previous modeling of AGN feedback in isolated elliptical galaxies (Gan et al. 2014) using the MACER (Massive AGN Controlled Ellipticals Resolved) code, we extend and i…
Numerical study of active galactic nucleus feedback in an elliptical galaxy with {\it MACER}
Feng Yuan, Jeremiah P. Ostriker, DooSoo Yoon +5
This paper summarizes our recent works of studying AGN feedback in an isolated elliptical galaxy by performing high-resolution hydrodynamical numerical simulations. Bondi radius is…
Reconciling the Quasar Microlensing Disc Size Problem with a Wind Model of Active Galactic Nucleus
Ya-Ping Li, Feng Yuan, Xinyu Dai
Many analyses have concluded that the accretion disc sizes measured from the microlensing variability of quasars are larger than the expectations from the standard thin disc theory…