1305.0819 (Alexander Kolodzig et al.)

AGN and QSOs in the eROSITA All-Sky Survey -- Part II: Studies of large-scale structure    [PDF]

Alexander Kolodzig, Marat Gilfanov, Gert Hütsi, Rashid Sunyaev

The four year X-ray all-sky survey (eRASS) of eROSITA telescope aboard the Spektrum-Roentgen-Gamma satellite will detect ~3 million AGN with a median redshift of z~1 and typical luminosity of L_{0.5-2.0keV} ~ 10^{44} erg/s. We show that this unprecedented AGN sample, complemented with redshift information, will supply us with outstanding opportunities for large-scale structure research. For the first time, detailed redshift and luminosity resolved studies of the bias factor for X-ray selected AGN will become possible. The eRASS AGN sample will not only improve the redshift and luminosity resolution of these studies but will also expand their luminosity range beyond L_{0.5-2.0 keV} ~ 10^{44} erg/s, thus making possible direct comparison of clustering properties of luminous X-ray AGN and optical quasars. These studies will dramatically improve our understanding of AGN environment, triggering mechanisms, growth of super-massive black holes and their co-evolution with dark matter halos. The eROSITA AGN sample will become a powerful cosmological probe. It will make possible detection of baryonic acoustic oscillations (BAOs) for the first time with X-ray selected AGN. With the data from entire extragalactic sky, BAO will be detected at a >~10sigma confidence level in the full redshift range and with ~8sigma confidence in the 0.8View original: http://arxiv.org/abs/1305.0819