Physics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4370h&link_type=abstract
HST Proposal ID #4370
Physics
Hst Proposal Id #4370
Scientific paper
We propose far-UV imaging of a sample of seven of the nearest powerful radio galaxies with the FOC. These data will provide qualitatively new insights into the radio galaxy phenomenon. They will: 1) Test the currently-fashionable 'unification schemes' for AGNs, by searching for light from a 'buried' quasar that has been scattered into our line-of-sight by dust or warm electrons in the radio galaxy's ISM 2) Probe the 'starburst-AGN-connection' and its role in fueling radio galaxies, by determining the structure and morphology of the regions of star-formation that have been glimpsed in existing ground-based optical images of some radio galaxies, and 3) Provide a local laboratory in which the mysterious 'alignment effect' that dominates the UV properties of high-redshift radio galaxies can be studied. Archival IUE spectra of our sample galaxies demonstrate that UV light will be detectable with HST. The UV imaging capabilities of HST are required for this project because scattered AGN light and light from young stars are both so blue that they would have at least a 30-times-better contrast against the old underlying stellar population at 2000A than at 3500A. The high angular resolution of HST is required for both the detection of this light and for the delineation of its structure.
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