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Resolving the Nuclear Radio Emission from M32 with Very Large Array
Sijia Peng, Zhiyuan Li, Loránt O. Sjouwerman +3
The Local Group dwarf elliptical galaxy M32 hosts one of the nearest and most under-luminous super-massive black holes (SMBHs) ever known, offering a rare opportunity to study the…
X-ray spectral shape variations in changing-look Seyfert galaxy SDSSJ155258+273728
Yanli Ai, Liming Dou, Chenwei Yang +7
We analyze the X-ray, optical, and mid-infrared data of a "changing-look" Seyfert galaxy \sdssj15 at . Over a period of one decade (2009 - 2018), its broad H line…
The Bending Feature of the Fermi Bubbles: A Presumed Horizontal Galactic Wind and Its Implication on the Bubbles' Age
Guobin Mou, Dongze Sun, Fuguo Xie
There are two spectacular structures in our Milky Way: the {\it Fermi} bubbles in gamma-ray observations and the North Polar Spur (NPS) structure in X-ray observations. Because of…
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…
Low-mass Active Galactic Nuclei on the Fundamental Plane of Black Hole Activity
Lei Qian, Xiao-Bo Dong, Fu-Guo Xie +2
It is widely known that in active galactic nuclei (AGNs) and black hole X-ray binaries (BHXBs), there is a tight correlation among their radio luminosity (), X-ray luminosity…
Triggering star formation by both radiative and mechanical active galactic nucleus feedback
Chao Liu, Zhao-ming Gan, Fu-guo Xie
We perform two dimensional hydrodynamic numerical simulations to study the positive active galactic nucleus feedback which triggers, rather than suppresses, star formation. Recentl…