2015A&A...574L..10C

Query : 2015A&A...574L..10C

2015A&A...574L..10C - Astronomy and Astrophysics, volume 574L10-10 (2015/2-1)

Mass without radiation: Heavily obscured AGNs, the X-ray background, and the black hole mass density.

COMASTRI A., GILLI R., MARCONI A., RISALITI G. and SALVATI M.

Abstract (from CDS):

A recent revision of black hole scaling relations indicate that the local mass density in black holes should be five times higher than previously determined values. The local black hole mass density is connected to the mean radiative efficiency of accretion through the time integral of the Active Galactic Nuclei (AGN) volume density and a significant increase in the local black hole mass density would have interesting consequences on AGN accretion properties and demography. One possibility to explain a large black hole mass density is that most of the black hole growth is via radiatively inefficient channels such as super Eddington accretion; however, this solution is not unique. Here we show how it is possible to accommodate a larger fraction of heavily buried, Compton-thick AGNs, without violating the limit imposed by the spectral energy density of the hard X-ray and mid-infrared backgrounds.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: bulges - X-rays: diffuse background - quasars: supermassive black holes

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1

Query : 2015A&A...574L..10C

Basic data :
NAME Chandra Deep Field-South -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		03 32 28.0 -27 48 30 [ ] D 2001ApJ...551..624G
FK4 coord. (ep=B1950 eq=1950) : 		03 30 22.4 -27 58 35 [ ]
Gal coord. (ep=J2000) : 		223.5732 -54.4374 [ ]
Angular size (arcmin): 		15.84 15.84 ~ (~) D ~
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Identifiers (4) :
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NAME Chandra Deep Field-South NAME CDFS NAME CDF-S NAME Chandra Deep Field South

References (2282 between 1850 and 2026) (Total 2282)
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