The Quest for Very High Redshift Black Holes

Details The Quest for Very High Redshift Black Holes The Quest for Very High Redshift Black Holes

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21345402c&link_type=abstract

American Astronomical Society, AAS Meeting #213, #454.02; Bulletin of the American Astronomical Society, Vol. 41, p.350

Astronomy and Astrophysics

Astronomy

Scientific paper

According to theoretical models for structure formation, massive black holes (MBH - 104-107 solar masses) are predicted to be abundant in the early Universe (z > 6), but at present there are no observational evidences. The detection of such a population would provide unique constraints on the MBH formation mechanism and subsequent growth and is within the capabilities of ultradeep IXO observations. I will present quantitative simulations of an IXO deep field, for different assumptions on the evolution of the X-ray luminosity function and obscured AGN fraction at high redshifts. I will also discuss the requirements (in terms of collecting area, spatial resolution and field of view) and the best trade offs needed to properly address the issue of MBH evolution. The importance of synergies with future facilities at longer wavelengths (i.e JWST, ALMA, SKA, E-ELT & LOFAR) will also be outlined.
This work is supported by ASI grants ASI/INAF I/088/06/0 I/023/05/0 and Prin MUR 2006-02-5203

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