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Faint COSMOS AGN at z~3.3 - I. Black Hole Properties and Constraints on Early Black Hole Growth
Benny Trakhtenbrot, Francesca Civano, C. Megan Urry +9
We present new Keck/MOSFIRE K-band spectroscopy for a sample of 14 faint, X-ray-selected active galactic nuclei (AGNs) in the COSMOS field. The data cover the spectral region surro…
On the relation of optical obscuration and X-ray absorption in Seyfert galaxies
L. Burtscher, R. I. Davies, J. Gracia-Carpio +15
The optical classification of a Seyfert galaxy and whether it is considered X-ray absorbed are often used interchangeably. But there are many borderline cases and also numerous exa…
ALMA resolves extended star formation in high-z AGN host galaxies
C. M. Harrison, J. M. Simpson, F. Stanley +6
We present high resolution (0.3") Atacama Large Millimeter Array (ALMA) 870um imaging of five z~1.5-4.5 X-ray detected AGN with luminosities of L(2-8keV)>10^42 erg/s. These data pr…
Are Compton-Thick AGN the Missing Link Between Mergers and Black Hole Growth?
Dale D. Kocevski, Murray Brightman, Kirpal Nandra +12
We examine the host morphologies of heavily obscured active galactic nuclei (AGN) at to test whether obscured supermassive black hole growth at this epoch is preferentiall…
An Over-Massive Black Hole in a Typical Star-Forming Galaxy, 2 Billion Years After the Big Bang
Benny Trakhtenbrot, C. Megan Urry, Francesca Civano +6
Supermassive black holes (SMBHs) and their host galaxies are generally thought to coevolve, so that the SMBH achieves up to about 0.2 to 0.5% of the host galaxy mass in the present…
Insights on the Dusty Torus and Neutral Torus from Optical and X-ray Obscuration in a Complete Volume Limited Hard X-ray AGN Sample
R. Davies, L. Burtscher, D. Rosario +21
We describe a complete volume limited sample of nearby active galaxies selected by their 14-195keV luminosity, and outline its rationale for studying the mechanisms regulating gas…