Mathematics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996elra.book.....n&link_type=abstract
The extended line-emission regions and the alignment effect in high redshift radio galaxies., by Neeser, M. J.. Heidelberg Univ
Mathematics
Scientific paper
Recent investigations of the environments of intermediate-to-high redshift, powerful radio galaxies have revealed that many of these sources are surrounded by extended regions of line-emission. The primary goal of this thesis is to find the mechanisms responsible for the creation and excitation of these line-emission regions, and their alignment with the radio galaxy. To do this the author has used a Fabry-Perot interferometer to image, at high spatial and kinematical resolution, the extended [O II] λ3727 regions of 11 powerful 3CR radio galaxies in the redshift range 0.5 ⪉ z ⪉ 1.1. Deep, intermediate-band, line-free continuum images of each of these sources have also been obtained. The author reports a number of interesting and surprising results. Foremost among these is the discovery that up to 40% of these radio sources have line-emission regions dominated by the effects of galaxy-galaxy interactions. For these objects he proposes a new model in which a close, strong interaction with a companion galaxy is responsible for supplying and exciting the warm gas that is observed on one side of the radio source.
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