we have assembled a unique dataset of deep near-infrared images of 3 statistically matched samples of radio-quiet quasars, radio-loud quasars and radio galaxies in the redshift band 0.1 < z < 0.3, on the strength of which we have recently been awarded 35 hst orbits of wfpc2 imaging in cycle 6 (- the largest single hst award made for quasar hosts). we therefore propose to ensure that the final iso database contains mid-ir to fir continuum measurements of all visible targets in our 3 samples, which contain a combined total of 48 sources. thus we request 77604 secs (or a reduced allocation of 46412 secs - see obs_summary) to observe the 22 agn not included in current open-time or guaranteed time proposals (which are visible during the remainder of the iso mission). we stress that we are the only group to have undertaken a study of the symbiotic relationship between the nature of the agn and the host galaxy in quasars and radio-loud galaxies, using carefully selected matched samples. we are also the only group to have obtained hst, ground-based optical (kpno 4-m, wht), infrared (ukirt), submm (jcmt) and radio (vla, merlin) images of matched samples of radio-loud and radio-quiet agn for this purpose, as well as off-nuclear optical spectroscopic measurements to combine with our latest stellar population synthesis models. hence we are in a unique position to perform a rigorous test of unified models for radio-loud sources, to determine the extent to which the different host galaxy morphologies (disc or spheroidal) of radio-loud and radio-quiet agn vary in terms of stellar mass, dust/gas content, spectral energy distribution, star-formation history of the host galaxy and the immediate environs.
Instrument
CAM01
Temporal Coverage
1997-04-10T10:43:46Z/1997-10-23T22:19:21Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, 1998, An Infrared Comparison Of The Host Galaxies Of Radio-Quiet Quasars Comma Radio-Loud Quasars And Radio Galaxies., 1.0, European Space Agency, https://doi.org/10.5270/esa-19c3fmj
