Computer Science
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10298c&link_type=abstract
HST Proposal ID #10298
Computer Science
Hst Proposal Id #10298 Galaxies
Scientific paper
We propose to study the evolution of the internal structure of galaxies for z<2. We will use existing ACS archival data from the two GOODS fields, along with the Hubble Ultra-Deep Field {UDF}. We will take maximal advantage of image depth and resolution, and use all four BVi'z' bands along with the wealth of available spectroscopic and photometric redshifts in these fields. We propose to: {1} Utilize our U-band database of over 300 nearby galaxies of all types and inclinations to calibrate quantitative structural measurements of these ACS images of galaxies with z<2 and take advantage of the multiband aspect of the Archival ACS data. {2} Apply a fully two dimensional Fourier Decomposition technique to quantify the existence of structural features {types of spiral features and bars or lack thereof} as a function of redshift to trace to formation of the present day Hubble sequence. {3} Use the deeper UDF images to study the reliability of such measurements over the wider GOODS fields and to push these measurements to fainter flux levels only where it can be justified using what is learned in {1}. {4} Produce and distribute a catalog of our results.
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