VLBI-selected high redshift quasars as X-ray beacons in the Early Universe

Details VLBI-selected high redshift quasars as X-ray beacons in the Early Universe VLBI-selected high redshift quasars as X-ray beacons in the Early Universe

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1513g&link_type=abstract

Chandra Proposal ID #05700452

Physics

Chandra Proposal Id #05700452

Scientific paper

X-rays at energies of 10-40 keV are important for understanding the physics of AGN and the contribution of AGN to the diffuse cosmic X-ray background. They must also bear imprints of the interaction of jets, emanating from AGN, with the CMB photons. But these hard energies are beyond bandpasses of most X-ray instruments. We aim at studying both topics above by observing six radio-selected quasars at z > 3 (including three at z > 4), thus taking advantage of shifting the hard energy range photons into the bandpass of the CHANDRA detectors. We have been studying VLBI images of these sources, which, in combination with the present project allow us to deduce the X-ray properties of the pc scale jets as well as studying connection to the X-ray structure at scales up to 500 kpc.

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