Tracing the Emergence of the Hubble Sequence Among the Most Luminous and Massive Galaxies

Details Tracing the Emergence of the Hubble Sequence Among the Most Luminous and Massive Galaxies Tracing the Emergence of the Hubble Sequence Among the Most Luminous and Massive Galaxies

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10258k&link_type=abstract

HST Proposal ID #10258

Mathematics

Logic

Hst Proposal Id #10258 Galaxies

Scientific paper

There is mounting evidence that the redshift range 1 < z < 2 was an important era when massive galaxies assembled their stellar content and assumed their present-day morphologies. Despite extensive HST imaging surveys, however, there is very little data in the optical rest frame {i.e., observed near-infrared} on the morphologies of the most luminous galaxies at these redshifts. We propose to image a carefully selected set of 20 of the most luminous, K-band selected GOODS galaxies at 1.3 < z < 2, using NICMOS camera 2. This offers diffraction-limited, critically sampled imaging at 1.6 microns to ensure the best angular resolution for comparison to ACS. The galaxies are chosen to span a simple 4-fold parameter space of morphological and spectral type, in order to provide the most information about the variety of massive galaxy properties in this redshift range. We will investigate the emergence of large scale-length disks, stable spiral structure, mature bulges with red stellar populations, central bar structures, the incidence of disturbed morphology, the existence {or lack thereof} of blue ellipticals, and other questions that concern the evolution and maturation of the brightest, largest, and most massive ordinary galaxies in this critical redshift range.

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