The nature of the most luminous star- forming galaxies in the redshift range 0.4 to 1.5

Details The nature of the most luminous star- forming galaxies in the redshift range 0.4 to 1.5 The nature of the most luminous star- forming galaxies in the redshift range 0.4 to 1.5

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9149h&link_type=abstract

HST Proposal ID #9149

Computer Science

Hst Proposal Id #9149 Cosmology

Scientific paper

ISO deep surveys have uncovered a population of galaxies which are making stars at the fantastic rate of > 100 M_odotyr^-1 in the redshift range from 0.4 to 1.5. However this population evolves rapidly and luminous star-forming galaxies are 5 to 10 times more numerous at z=1 than today. Combination of ISO data with radio {VLA}, sub-mm {SCUBA} and optical data shows that they contribute a major fraction {30-50 representing only a few percent of the field galaxy population. HST imaging of a small subsample of these galaxies indicates that most of them are disks showing disrupted morphologies or possessing companions, emphasizing the role of merging in their star formation history. We propose to image the two CFRS fields which contain the largest number of bolometrically luminous galaxies ever observed at all wavelengths. Together, they cover 36 times more area than the HDF and 8 times more area than the ultradeep ISO field and contain nearly 200 ISO/SCUBA/VLA sources at a few 100 MuJy level, most of them being luminous star-forming galaxies. Morphology and {V-I} colors of 80 of these objects, combined with deep spectroscopy at the VLT and Keck, will allow us to probe the nature and formation of these objects which may be progenitors of today's massive galaxies.

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