Imaging of a Complete Sample of the Nearest Infrared Quasars

Details Imaging of a Complete Sample of the Nearest Infrared Quasars Imaging of a Complete Sample of the Nearest Infrared Quasars

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3906s&link_type=abstract

HST Proposal ID #3906

Mathematics

Logic

Hst Proposal Id #3906

Scientific paper

We propose high resolution imaging with the Faint Object Camera (FOC/96) of a complete sample of the nearest infrared quasars that have been discovered in the IRAS database. These objects appear to represent a critical evolutionary link between ultraluminous infrared galaxies and optical quasars. The FOC obseravtions will provide an important test of the hypothesis that all quasars form through the merger of gas-rich spirals. Ground-based optical and near-infrared images of our complete sample of IRAS bright galaxies now indicate that all of the most luminous objects are mergers. A strong correlation has been discovered between the incidence of AGN spectra, warmer infrared colors, decreased nuclear separation, and stronger - more pointlike - optical nuclei with increasing infrared luminosity. The infrared quasars that we are proposing to observe with HST provide direct evidence for the transition stage from ultraluminous infrared galaxy to optical quasar if it can be demonstrated that there exists a continuity in morphological properties with those observed in the cooler infrard objects. FOC images in U,B, and V filters will be used to identify double nuclei and to measure nuclear separations and magnitudes. HST images will provide a factor 10 - 30 increased resolution over that attainable from the ground.

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