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The Chandra COSMOS Legacy survey: optical/IR identifications
S. Marchesi, F. Civano, M. Elvis +27
We present the catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6 Ms Chandra program on the 2.2 square degrees of the COSMOS field, combination…
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…
[O III] and X-ray Properties of a Complete Sample of Hard X-ray Selected AGNs in the Local Universe
Y. Ueda, Y. Hashimoto, K. Ichikawa +11
We study the correlation between the [O III] and X-ray luminosities of local Active Galactic Nuclei (AGNs), using a complete, hard X-ray ( keV) selected sample in the S…
Star formation black hole growth and dusty tori in the most luminous AGNs at z=2-3.5
Hagai Netzer, Caterina Lani, Raanan Nordon +3
We report herschel observations of 100 very luminous, optically selected AGNs at z=2-3.5 with log(LUV)(erg/sec)> 46.5, where LUV=L1350A. The distribution in LUV is similar to the g…
The search for active black holes in nearby low-mass galaxies using optical and mid-IR data
Lia F. Sartori, Kevin Schawinski, Ezequiel Treister +4
We investigated AGN activity in low-mass galaxies, an important regime that can shed light onto BH formation and evolution, and their interaction with their host galaxies. We ident…
BAT AGN Spectroscopic Survey II: X-ray Emission and High Ionization Optical Emission Lines
Simon Berney, Michael Koss, Benny Trakhtenbrot +17
We investigate the relationship between X-ray and optical line emission in 340 nearby AGN selected above 10 keV using Swift BAT. We find a weak correlation between the extinction c…
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…
A New Catalogue of Type 1 AGN and its Implication on the AGN Unified Model
Kyuseok Oh, Sukyoung K. Yi, Kevin Schawinski +2
We have newly identified a substantial number of type 1 active galactic nuclei (AGN) featuring weak broad-line regions (BLRs) at z < 0.2 from detailed analysis of galaxy spectra in…
Detection of Rest-frame Optical Lines from X-shooter Spectroscopy of Weak Emission Line Quasars
Richard M. Plotkin, Ohad Shemmer, Benny Trakhtenbrot +10
Over the past 15 years, examples of exotic radio-quiet quasars with intrinsically weak or absent broad emission line regions (BELRs) have emerged from large-scale spectroscopic sky…