SIMBAD references

2008ApJ...672...94F - Astrophys. J., 672, 94-101 (2008/January-1)

Unveiling obscured accretion in the Chandra Deep Field-South.

FIORE F., GRAZIAN A., SANTINI P., PUCCETTI S., BRUSA M., FERUGLIO C., FONTANA A., GIALLONGO E., COMASTRI A., GRUPPIONI C., POZZI F., ZAMORANI G. and VIGNALI C.

Abstract (from CDS):

We make use of deep HST, VLT, Spitzer, and Chandra data on the Chandra Deep Field-South to constrain the number of Compton-thick AGNs in this field. We show that sources with high 24 µm-to-optical flux ratios and red colors form a distinct source population, and that their infrared luminosity is dominated by AGN emission. Analysis of the X-ray properties of these extreme sources shows that most of them (80%±15%) are indeed likely to be highly obscured, Compton-thick AGNs. The number of infrared-selected, Compton-thick AGNs with 5.8 µm luminosity higher than 1044.2 ergs/s turns out to be similar to that of X-ray-selected, unobscured, and moderately obscured AGNs with 2-10 keV luminosity higher than 1043 ergs/s in the redshift bin 1.2-2.6. This ``factor of 2'' source population is exactly what is needed to solve the discrepancies between model predictions and X-ray AGN selection.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: High-Redshift - X-Rays: Diffuse Background

Simbad objects: 11

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2021.01.16-12:31:27

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