Mathematics – Logic
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8756y&link_type=abstract
HST Proposal ID #8756
Mathematics
Logic
Hst Proposal Id #8756 Galaxies
Scientific paper
To date HST/WFPC2 has imaged over 450 fields at intermediate and high galactic latitudes to a depth of I_c 26 mag {3Sigma in an 1Box^'' aperture} in the F814W filter. We propose an archival research program using these deep images in combination with ground-based K-band observations, to search for extremely red objects {EROs} with I_c - K > 5 and K < 19.0. We will survey roughly 1700 square arcminutes and expect to detect 68 bright EROs. The HST archive offers us two unique advantages to carry out an efficient survey: it provides a wealth of deep I-band images otherwise difficult to obtain from the ground, and the high resolution images will enable us to study in detail the distribution of ERO morphological types as a function of color. With the advent of large format near- IR detectors, imaging bright EROs in K-band over a large area is becoming efficient. In two years, this survey will produce the largest sample of bright EROs, useful for follow-up studies to determine the nature of EROs. Our ultimate goals are to 1}. measure the percentages of old elliptical and dusty starburst galaxies among the overall ERO population, setting strong constraints on theories of the formation and evolution of massive galaxies; 2}. determine how significant the starburst EROs contribute to the global star formation rate; and 3}. determine the relationship between EROs and the local ultra-luminous IRAS galaxies.
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