Morphologies of - Radio Galaxies

Details Morphologies of - Radio Galaxies Morphologies of - Radio Galaxies

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6632m&link_type=abstract

HST Proposal ID #6632

Physics

Hst Proposal Id #6632 Cosmology

Scientific paper

We propose to continue our study of the continuum and Ly Alpha morphologies of 20 high-redshift radio galaxies begun in Cycle 5. Our sample was chosen from 50 candidates to be bright in both continuum and Ly Alpha. The observations would elucidate sub-kiloparsec-scale structures in the target galaxies, allowing study of their alignment and relationships to the associated radio sources. Of particular interest is a comparison between the HST clumpiness and the recently discovered spatially-extended absorption systems in the Ly Alpha profiles., During Cycle 5 we were allocated time to begin the project, with 8 broad-band targets and 3 Ly Alpha LRF test images. The first of these observations show that {i} features of which are difficult to explain by a single simple scattering or starburst model, {ii} a variety of different morphologies, which provide compelling arguments that imaging a larger sample is essential for understanding the processes involved, {iii} our exposure times are well chosen to delineate the morphologies, both in the continuum and Ly Alpha. The images will also be used to provide the most interesting targets for a followup spectroscopic and kinematic study with STIS., The project is providing unique information relevant to the formation and evolution of radio galaxies, to relationships between galaxy and quasar activity and to physical conditions in the early Universe.

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