552 citations · 16.5k across the 268 of their papers we have counts for
47 papers · 1 filter
Evolution of Galaxies and their Environments at z = 0.1 to 3 in COSMOS
N. Scoville, S. Arnouts, H. Aussel +43
Large-scale structures (LSS) out to z are measured in the Cosmic Evolution Survey (COSMOS) using extremely accurate photometric redshifts (photoz). The Ks-band selected sam…
A near-infrared relationship for estimating black hole masses in active galactic nuclei
Hermine Landt, Martin J. Ward, Bradley M. Peterson +4
Black hole masses for samples of active galactic nuclei (AGN) are currently estimated from single-epoch optical spectra using scaling relations anchored in reverberation mapping re…
Fast and Furious: Shock Heated Gas as the Origin of Spatially Resolved Hard X-ray Emission in the Central 5 kpc of the Galaxy Merger NGC 6240
Junfeng Wang, Emanuele Nardini, Giuseppina Fabbiano +7
We have obtained a deep, sub-arcsecond resolution X-ray image of the nuclear region of the luminous galaxy merger NGC 6240 with Chandra, which resolves the X-ray emission from the…
The Distribution of AGN Covering Factors
Andy Lawrence, Isaac Roseboom, Jack Mayo +4
We review our knowledge of the most basic properties of the AGN obscuring region - its location, scale, symmetry, and mean covering factor - and discuss new evidence on the distrib…
A comparative analysis of virial black-hole mass estimates of moderate-luminosity active galactic nuclei using Subaru/FMOS
Kenta Matsuoka, John D. Silverman, Malte Schramm +27
We present an analysis of broad emission lines observed in moderate-luminosity active galactic nuclei (AGNs), typical of those found in X-ray surveys of deep fields, with the aim t…
A transition mass for black holes to show broad emission lines
Susmita Chakravorty, Martin Elvis, Gary Ferland
Although the super-massive (AGN) and stellar mass (XRBs) black holes have many properties in common, the broad emission lines (BELs) are exclusively signatures of the AGN. Based on…
Chandra View of the Warm-Hot IGM toward 1ES 1553+113: Absorption Line Detections and Identifications (Paper I)
F. Nicastro, M. Elvis, Y. Krongold +14
We present the first results from our pilot 500 ks Chandra-LETG Large Program observation of the soft X-ray brightest source in the z>=0.4 sky, the blazar 1ES 1553+113, aimed to se…
Spectral Energy Distributions of Type 1 AGN in the COSMOS Survey I - The XMM-COSMOS Sample
M. Elvis, H. Hao, F. Civano +39
The "Cosmic Evolution Survey" (COSMOS) enables the study of the Spectral Energy Distributions (SEDs) of Active Galactic Nuclei (AGN) because of the deep coverage and rich sampling…
The Chandra HRC View of the Sub-arcsecond Structures in the Nuclear Region of NGC 1068
Junfeng Wang, Giuseppina Fabbiano, Margarita Karovska +2
We have obtained a high spatial resolution X-ray image of the nucleus of NGC 1068 using the High Resolution Camera (HRC-I) on board the Chandra X-ray Observatory, which provides an…
Millimeter imaging of submillimeter galaxies in the COSMOS field: Redshift distribution
V. Smolcic, M. Aravena, F. Navarrete +21
We present new IRAM PdBI 1.3mm continuum observations at ~1.5" resolution of 28 SMGs previously discovered with the 870um bolometer LABOCA at APEX within the central 0.7deg2 of the…
Bolometric luminosities and Eddington ratios of X-ray selected Active Galactic Nuclei in the XMM-COSMOS survey
E. Lusso, A. Comastri, B. D. Simmons +25
Bolometric luminosities and Eddington ratios of both X-ray selected broad-line (Type-1) and narrow-line (Type-2) AGN from the XMM-Newton survey in the COSMOS field are presented. T…
The Chandra COSMOS Survey: III. Optical and Infrared Identification of X-ray Point Sources
F. Civano, M. Elvis, M. Brusa +29
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.9 deg^2 of the COSMOS field down to limiting depths of 1.9 10^-16 erg cm^-2 s…
A Population of Dust-Rich Quasars at z ~ 1.5
Y. Sophia Dai, Jacqueline Bergeron, Martin Elvis +19
We report Herschel SPIRE (250, 350, and 500 micron) detections of 32 quasars with redshifts 0.5 < z < 3.6 from the Herschel Multi-tiered Extragalactic Survey. These sources are fro…
IR-derived covering factors for a large sample of quasars from WISE-UKIDSS-SDSS
I. G. Roseboom, A. Lawrence, M. Elvis +3
We investigate the range of covering factors (determined from the ratio of IR to UV/optical luminosity) seen in luminous type 1 quasars using a combination of data from the WISE, U…
The impact of galaxy interactions on AGN activity in zCOSMOS
J. D. Silverman, P. Kampczyk, K. Jahnke +52
Close encounters between galaxies are expected to be a viable mechanism, as predicted by numerical simulations, by which accretion onto supermassive black holes can be initiated. T…
A Close Nuclear Black Hole Pair in the Spiral Galaxy NGC 3393
G. Fabbiano, Wang Junfeng, M. Elvis +1
The current picture of galaxy evolution advocates co-evolution of galaxies and their nuclear massive black holes (MBHs), through accretion and merging. Quasar pairs (6,000-300,000…
Dissecting Photometric redshift for Active Galactic Nuclei using XMM- and Chandra-COSMOS samples
M. Salvato, O. Ilbert, G. Hasinger +61
With this paper, we release accurate photometric redshifts for 1692 counterparts to Chandra sources in the central square degree of the COSMOS field. The availability of a large tr…
Black hole accretion and host galaxies of obscured quasars in XMM-COSMOS
V. Mainieri, A. Bongiorno, A. Merloni +61
We explore the connection between black hole growth at the center of obscured quasars selected from the XMM-COSMOS survey and the physical properties of their host galaxies. We stu…
The Population of High Redshift AGNs in the Chandra COSMOS survey
F. Civano, M. Brusa, A. Comastri +19
We present the high redshift (3<z<5.3) 0.5-2 keV number counts and the 2-10 keV (rest frame) space density of X-ray selected AGNs detected in the Chandra COSMOS survey. The sample…
A Deep Chandra ACIS Study of NGC 4151. III. the Line Emission and Spectral Analysis of the Ionization Cone
Junfeng Wang, Giuseppina Fabbiano, Martin Elvis +6
This paper is the third in a series in which we present deep Chandra ACIS-S imaging spectroscopy of the Seyfert 1 galaxy NGC 4151, devoted to study its complex circum-nuclear X-ray…
A Deep Chandra ACIS Study of NGC 4151. II. The Innermost Emission Line Region and Strong Evidence for Radio Jet-NLR Cloud Collision
Junfeng Wang, Giuseppina Fabbiano, Martin Elvis +4
We have studied the X-ray emission within the inner 150 pc radius of NGC 4151 by constructing high spatial resolution emission line images of OVII, OVIII, and NeIX. These maps show…
Spectropolarimetric Evidence for Radiatively Inefficient Accretion in an Optically Dull Active Galaxy
Jonathan R. Trump, Tohru Nagao, Hiro Ikeda +9
We present Subaru/FOCAS spectropolarimetry of two active galaxies in the Cosmic Evolution Survey. These objects were selected to be optically dull, with the bright X-ray emission o…
A Deep Chandra ACIS Study of NGC 4151. I. the X-ray Morphology of the 3 kpc-diameter Circum-nuclear Region and Relation to the Cold Interstellar Medium
Junfeng Wang, Giuseppina Fabbiano, Guido Risaliti +6
We report on the imaging analysis of 200 ks sub-arcsecond resolution Chandra ACIS-S observations of the nearby Seyfert 1 galaxy NGC 4151. Bright, structured soft X-ray emission is…
A massive proto-cluster of galaxies at a redshift of z {\approx} 5.3
Peter L. Capak, Dominik Riechers, Nick Z. Scoville +14
Massive clusters of galaxies have been found as early as 3.9 Billion years (z=1.62) after the Big Bang containing stars that formed at even earlier epochs. Cosmological simulations…