Mathematics – Logic
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6235l&link_type=abstract
HST Proposal ID #6235
Mathematics
Logic
Hst Proposal Id #6235 Galaxies &Amp, Clusters
Scientific paper
Radio galaxies represent the most extensively studied and best defined stellar systems at cosmological redshifts, and as such give unique insights into both the nature of star-formation in distant galaxies and the origin of the AGN activity. In the late 1980's it was discovered that many radio galaxies exhibit a significant blue and ultraviolet excess, which has a tendency to be elongated along the radio axis of the source. This alignment effect shows that active galactic nuclei have a very profound effect upon these young galaxies, and before any progress can be made in modelling the stellar systems inside these galaxies, it is crucial that the causes of this alignment are properly understood. Many theories have been proposed in an attempt to explain the effect, but none are entirely satisfactory. To investigate these issues a sample of 28 radio galaxies with redshifts 0.6 < z < 1.8 was defined. During cycle 4 images of 24 of these galaxies were taken using the HST. The current proposal concerns observations of the same type for the remaining four galaxies plus some additional observations of five of the original 24 galaxies to complement those already taken.
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