Mathematics – Logic
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10581s&link_type=abstract
HST Proposal ID #10581
Mathematics
Logic
Hst Proposal Id #10581 Cosmology
Scientific paper
We propose deep ACS/WFC imaging in the HS1700+643 field, which contains a significant galaxy over-density at z=2.30+/-0.015. This structure is the largest and most robustly established cluster-sized over-density at z>1.5. We have spectroscopically confirmed 100 z~2 star-forming galaxies in this field and find significant differences in their stellar populations as a function of large-scale environment. Here we propose to measure the detailed morphological properties of this sample, to determine if the universal morphology-density relationship observed in the low-redshift universe is already in place in and around a forming proto-cluster region at high redshift. As well as providing a unique window into galaxy formation through studies of the z=2.3 proto-cluster, the HS1700+643 field has an extensive wealth of complementary data to recommend it. We will combine the new ACS observations with existing multi-wavelength imaging ranging from 0.3--8.0 microns, optical and near-IR spectroscopy, and narrow band imaging of z=2.3 H-alpha emitters, to understand the evolving properties of a complete and unbiased sample of high-redshift galaxies.
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