The Host Galaxies of Radio-Quiet - Redshift Quasi-Stellar Objects

Details The Host Galaxies of Radio-Quiet - Redshift Quasi-Stellar Objects The Host Galaxies of Radio-Quiet - Redshift Quasi-Stellar Objects

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5973l&link_type=abstract

HST Proposal ID #5973

Computer Science

Hst Proposal Id #5973 Quasars

Scientific paper

Studying the environments of quasi-stellar objects (QSOs) at high redshift may help to answer the question: Why were powerful QSOs three orders of magnitude more common at z=2 to 3 than at present? Recent data have shown that high-z radio- loud quasars are immersed in spatially-resolved ``fuzz'' with properties suggestive of young, massive galaxies. Quasars as radio-loud as those studied to date represent <<1 population of high-redshift radio galaxies are equally rare). To understand the applicability of these results to the much more numerous radio-quiet QSOs, and hence their implications for understanding the causes and effects of the ``quasar epoch'' at high-redshift, we propose to conduct a narrow-band (at LyAlpha) and broad-band (F555W) optical imaging investigation using WFPC2 on HST of a small sample of radio-quiet QSOs at similarly high redshifts as the radio-loud quasars studied previously. These data will allow us for the first time to compare at similar absolute spatial resolution the morphologies and luminosities of high-redshift radio-quiet QSOs to those of low-redshift QSOs studied from the ground, thus determining how the host galaxies of QSOs have evolved with time, and also to compare the hosts of high-redshift radio-quiet and radio-loud quasars.

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