Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5393l&link_type=abstract
HST Proposal ID #5393
Physics
Hst Proposal Id #5393 Quasars &Amp, Agn Host Galaxies
Scientific paper
The co-moving space density of highly luminous radio-loud quasars has decreased by roughly 3 orders of magnitude from z=2-3 to the current epoch. Understanding the physical processes responsible for this decrease could profoundly influence how we think the universe and galaxies have evolved. In order to make the first steps in understanding these physical processes, we propose to conduct a narrow (at Lyman alpha) and broad-band imaging survey of five radio-loud, high-z (z=2) quasars using WFPC2. HST observations are crucial for separating the "blinding" nuclear emission (AGN) from that of the extended "fuzz" (parent galaxy). They will allow quantitative comparisons of the emission-line and continuum morphologies of the host galaxies of high-z quasars to those of comparable high-z radio galaxies, and of low-z quasars. Such comparisons will allow us to investigate whether or not radio-loud quasars and radio galaxies are members of the same parent population as is fashionable in the AGN unification schemes and how luminous AGN have evolved from redshifts of 2-3.
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