AGN Clustering in the Local Universe [electronic resource] : An Unbiased Picture from Swift-BAT.
Astrophysics,astro.
Saved in:
| Online Access: |
Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C : Oak Ridge, Tenn. :
United States. Dept. of Energy ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
2011.
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| Subjects: |
| Summary: | Astrophysics,astro. |
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| Abstract: | We present the clustering measurement of hard X-ray selected AGN in the local Universe. We used a sample of 199 sources spectroscopically confirmed detected by Swift-BAT in its 15-55 keV all-sky survey. We measured the real space projected auto-correlation function and detected a signal significant on projected scales lower than 200 Mpc/h. We measured a correlation length of r₀ = 5.56{sup +0.49}{sub -0.43} Mpc/h and a slope γ = 1.64{sup -0.08}{sub -0.07}. We also measured the auto-correlation function of Tyep I and Type II AGN and found higher correlation length for Type I AGN. We have a marginal evidence of luminosity dependent clustering of AGN, as we detected a larger correlation length of luminous AGN than that of low luminosity sources. The corresponding typical host DM halo masses of Swift-BAT are ≈ log(M{sub DMH) ≈ 12-14 h⁻¹M/M{sub {circle_dot}} which is the typical mass of a galaxy group. We estimated that the local AGN population has a typical lifetime τ{sub AGN} ≈0.7 Gyr, it is powered by SMBH with mass M{sub BH} ≈1-10x10⁸ M{sub {circle_dot}} and accreting with very low efficiency, log(ε){approx}-2.0>. We also conclude that local AGN galaxies are typically red-massive galaxies with stellar mass of the order 2-80x10¹° h⁻¹M{sub {circle_dot}}. We compared our results with clustering predictions of merger-driven AGN triggering models and found a good agreement. |
| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 08/11/2011. "slac-pub-14145" "arXiv:1005.4968" Astrophys.J.716:L209,2010 716 FT. Ajello, M.; Miyaji, T.; Cappelluti, N.; Burlon, D.; Greiner, J.; Krumpe, M.; Bonoli, S. |
| Physical Description: | 13 pages : digital, PDF file. |