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Evidence for Optically Thick, Eddington-limited Winds Driven by Supercritical Accretion
Yu Zhou, Hua Feng, Luis C. Ho +1
Supercritical accretion onto compact objects powers a massive wind that is optically thick and Eddington-limited. If most of the hard X-rays from the central disk are obscured by t…
BAT AGN Spectroscopic Survey -- XII. The relation between coronal properties of Active Galactic Nuclei and the Eddington ratio
C. Ricci, L. C. Ho, A. C. Fabian +12
The bulk of the X-ray emission in Active Galactic Nuclei (AGN) is produced very close to the accreting supermassive black hole (SMBH), in a corona of hot electrons which up scatter…
Serendipitous Discovery of a 14-year-old Supernova at 16 Mpc
James Guillochon, Jorge Stockler de Moraes, Matt Nicholl +5
In this Research Note we present a serendipitous discovery of the transient CGS2004A (AT2004iu) in an image collected by the Carnegie-Irvine Galaxy Survey of the Scd: galaxy NGC 18…
Possible ~ 1 hour quasi-periodic oscillation in narrow-line Seyfert 1 galaxy MCG--06--30--15
Alok C. Gupta, Ashutosh Tripathi, Paul J. Wiita +3
We found a possible ~ 1 hour quasi-periodic oscillation (QPO) in a ~ 55 ks X-ray observation of the narrow-line Seyfert 1 galaxy MCG--06--30--15 made with the XMM-Newton EPIC/pn de…
A large accretion disk of extreme eccentricity in the TDE ASASSN-14li
R. Cao, F. K. Liu, Z. Q. Zhou +2
In the canonical model for tidal disruption events (TDEs), the stellar debris circularizes quickly to form an accretion disk of size about twice the orbital pericenter of the star.…
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…
Chandra Survey of Nearby Galaxies: Testing the Accretion Model for Low-luminosity AGNs
Rui She, Luis C. Ho, Hua Feng +1
From a Chandra sample of active galactic nuclei (AGNs) in nearby galaxies, we find that for low-luminosity AGNs (LLAGNs), either the intrinsic absorption column density, or the fra…
Stellar and AGN feedback in isolated early-type galaxies: the role in regulating star formation and ISM properties
Ya-Ping Li, Feng Yuan, Houjun Mo +6
Understanding how galaxies maintain the inefficiency of star formation with physically self-consistent models is a central problem for galaxy evolution. Although numerous theoretic…