ACS Imaging of a High-Redshift Cluster of Galaxies

Details ACS Imaging of a High-Redshift Cluster of Galaxies ACS Imaging of a High-Redshift Cluster of Galaxies

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10327f&link_type=abstract

HST Proposal ID #10327

Computer Science

Hst Proposal Id #10327

Scientific paper

This programme uses ACS observations of the high-redshift radio galaxy MRC1138-262 {z=2.16} to investigate massive galaxy and cluster formation in the early Universe. This field is unique in that it is known to contain overdensities in both line-emitting {both Lyman-alpha and H-alpha} and continuum {4000A break} objects. Utilizing the excellent angular-resolution and field-coverage of HST/ACS we can obtain the colors and morphologies for a substantial fraction of these protocluster galaxies. These morphologies and colors will be compared to studies of field galaxies at similar redshifts {e.g., from GOODS}. In addition, very deep images of the radio galaxy itself, the presumed central dominant galaxy of this cluster, will allow us to study in detail the process of formation for the most massive known galaxies. The properties of continuum and Ly-alpha clumps within the radio galaxy will be compared in relation to the radio structures.

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