Morphologies of EROs and Field Galaxies in SIRTF's First Look Survey: A Rich Early Release Dataset

Details Morphologies of EROs and Field Galaxies in SIRTF's First Look Survey: A Rich Early Release Dataset Morphologies of EROs and Field Galaxies in SIRTF's First Look Survey: A Rich Early Release Dataset

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9753s&link_type=abstract

HST Proposal ID #9753

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #9753 Galaxies

Scientific paper

The SIRTF First Look Survey {FLS} will be the first scientific program undertaken with NASA's next Great Observatory. The FLS provides the first large sample of dusty galaxies to redshifts to z < 2 and a census of large-scale global IR properties {luminosities, color temperatures, total dust mass, etc.} HST observations to measure morphology are critical to provide insight into the mechanisms which build up the various galaxy components-disks, bulges as well as chaotic morphologies. We will measure quantitative morphology of fifty extremely red objects {EROs} with targeted NICMOS pointings and hundreds of field galaxies with ACS in parallel in the FLS. We aim to understand how EROs fit into the evolutionary sequence of galaxy formation. The combined HST and SIRTF observations will provide clues into the physical processes responsible for generating powerful far-IR sources or, conversely, may explain why some galaxies are inactive in the far-IR. Ancillary ground-based optical, near-IR, and radio data have already been obtained and DEIMOS spectra are scheduled for June, 2003. We waive the proprietary period for the HST observations and if executed early in Cycle 12 the FLS will be the first complete SIRTF+HST survey made available to the astronomical community, well in advance of the majority of the Legacy observations and all of the GTO surveys.

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