Giant Lya Halos Around High Redshift Radio Galaxies

Details Giant Lya Halos Around High Redshift Radio Galaxies Giant Lya Halos Around High Redshift Radio Galaxies

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9779v&link_type=abstract

HST Proposal ID #9779

Mathematics

Logic

Hst Proposal Id #9779 Cosmology

Scientific paper

We propose to use the ACS + ramp filter to image the morphologies of several high redshift, giant Lya emission line halos associated with radio galaxies. High redshift radio galaxies are the likely precursors of the most massive elliptical galaxies known today. There is increasing evidence that they are forming in the centers of giant halos in overdense galaxy regions or `protoclusters'. The halos provide a unique diagnostic to study the formation of these massive galaxies and determine the importance of AGN/starburst feedback during this process. The capability of HST to resolve fine detail is essential for the interpretation of their complex morphologies. Our targets have also a number of Lya excess galaxies near the halos which fall within the field-of-view of the ACS + ramp filters. Our images will resolve these systems and we will investigate whether there is morphological evidence for starburst outflows. Starburst winds have been proposed as a source of heat and chemical enrichment for protoclusters, which may significantly affect their evolution.

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