Blue Continuum Snapshots of 3CR Radio - Continued Galaxies

Details Blue Continuum Snapshots of 3CR Radio - Continued Galaxies Blue Continuum Snapshots of 3CR Radio - Continued Galaxies

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6967s&link_type=abstract

HST Proposal ID #6967

Astronomy and Astrophysics

Astrophysics

Hst Proposal Id #6967 Agn

Scientific paper

Radio galaxies are an important class of extragalactic objects: they represent one of the most energetic astrophysical phenomena; they may be used as probes of their environments; and they are unique probes of the early Universe. The size scales and brightness levels which HST can measure are ideally suited to the study of optical emission associated with the host galaxies of radio sources and anomalies such as jets and tidal debris. In Cycle 4 we carried out a red continuum snapshot survey of the 3CR catalog to ask: What are the host galaxy morphologies --- are there differences between FR-I and FR-II sources, nuclear cusps, tidal tails? How common are optical jets? Do optical continuum and radio structures align? How common are dust- discs; what is their orientation and morphology? In Cycle 5 we are observing emission line 3C sources to map circumnuclear ionized gas, identify where jets and gas interact, and find gas disks and filaments. Here we propose to add blue continuum observations to provide unique high spatial resolution information on the color distribution within galaxies, the reddening due to dust, the spectral indices of optical synchrotron jets and the colors of active nuclei and tidal tails. We will measure colors of star clusters at low redshift and see how the alignment effect ``turns on'' with redshift at a second, bluer wavelength. The resulting database on one of the most studied samples ever will be a major resource for the astronomical community and we will waive proprietary rights to these data.

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