Hard X-ray surveys efficiently sample the obscured AGN population and in particular those with redder colors which would not be selected by UVX surveys. The discovery that a sizable fraction (~20%) of hard X-ray sources are also associated to extremely red objects (EROs) with optical to near-infrared colour R-K>5 is even more intriguing
Brusa M., Comastri A., Daddi E., Pozzetti L., Zamorani G., Vignali C., et al. (2005). The Masses of X-ray Emitting EROs. BERLINO : Springer-Verlag [10.1007/11403913_16].
The Masses of X-ray Emitting EROs
BRUSA, MARCELLA;VIGNALI, CRISTIAN;CIMATTI, ANDREA;
2005
Abstract
Hard X-ray surveys efficiently sample the obscured AGN population and in particular those with redder colors which would not be selected by UVX surveys. The discovery that a sizable fraction (~20%) of hard X-ray sources are also associated to extremely red objects (EROs) with optical to near-infrared colour R-K>5 is even more intriguingFile in questo prodotto:
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