Computer Science
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7460m&link_type=abstract
HST Proposal ID #7460
Computer Science
Hst Proposal Id #7460 Cosmology
Scientific paper
We propose to use HST and F160W on NICMOS to target a class of faint {I gt 25} field galaxies which have blue optical colors {V-I=0-2} but red infrared colors {I-K>4}. If the red color of these ``red outlier galaxies'' {ROGs} is due to dusty, evolved nuclei, we expect that high-resolution imaging in the near-infrared will reveal the central region to be very concentrated compared to the optical. Observations of several preselected candidates with F160W on NICMOS will make this distinction directly, and will also provide enough data to constrain the location of the 4000Angstrom break for the ROGs. The surface density of the ROGs is several per square arcminute, and as such comprise an important fraction of galaxies in deep near-infrared surveys. The targets are in the deep portion of the Groth Survey Strip {dGSS}, for which we already have WFPC2 archival data and very deep K band imaging from the Keck telescope, which allows us to pre-select all the targets. We will specifically target ROGs in the PC portion of the dGSS with Camera NIC2 and F160W. Cameras NIC1 and NIC3, both with F160W, will be used simultaneously, targeted on a second set of ROGs.
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