Understanding the UV Alignments of Low and High Redshift Radio Galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

A spectacular demonstration of the link between galaxy activity and the host galaxy's global properties is the ``alignment effect'': high redshift radio galaxies (z > 1) have complex UV morphologies that are aligned with the major axis of their radio emission. Several explanations have been suggested for the alignment effect, but a detailed study of the continuum light in high redshift radio galaxies which would distinguish between these possibilities has thus far been precluded by the optical faintness of these galaxies. Our research is focused on understanding the alignment effect by (1) identifying low redshift (z<0.2) radio galaxies which exhibit the alignment effect; these galaxies lend themselves to a detailed study because of their relative brightness, and (2) directly studying the extended optical continuum in high redshift radio galaxies using W. M. Keck Telescope and the refurbished Hubble Space Telescope. We present the results of a continuum imaging survey of a sample of low redshift radio galaxies (0.08

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