Computer Science
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9902r&link_type=abstract
HST Proposal ID #9902
Computer Science
Hst Proposal Id #9902 Agn/Quasars
Scientific paper
Study of the host galaxies and environments of high redshift AGN is proving a valuable probe of current theories of how galaxies form and evolve. Results from our NICMOS imaging program have indicated that the hosts of z 2 - 3 faint radio-quiet quasars {RQQ} have luminosities only around local L*, making them similar to Lyman-break field galaxies at the same redshifts, and to the low-z hosts RQQ hosts. This is roughly consistent with theoretical predictions of Kauffmann & Haehnelt {2000} for the hierarchical buildup of galaxy hosts and their relation to their resident supermassive black holes. The luminosity of the AGN in these RQQ is key to understanding this relationship, however, and we are making a comprehensive archival HST imaging study of the hosts of RQQs from low to high z at a range of nuclear luminosities. At intermediate z, however, there are no studies of the hosts of RQQs in the faint luminosity range that represents the bulk of the quasar population. In the present proposal, we request imaging at the same rest-wavelengths as our high-z sample of the hosts of 10 similarly luminous RQQs at z 0.9. These data will fill in an important part of the parameter space defined by quasar luminosity and redshift. Combined with existing HST data they will allow us to trace the evolution of the hosts of RQQ and that of the relationship between quasar luminosity and host galaxy luminosity.
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