Physics
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..422m&link_type=abstract
NOAO Proposal ID #1999A-0422
Physics
Scientific paper
After many unsuccesful searches for the strong Lyman-(alpha) emission lines expected from the first burst of star formation in spheroidal systems, recent and more sensitive emission line surveys have detected a few Ly-(alpha) emitters at fainter levels. Fainter level emission in galaxies may be due to lower star formation rates, extinction in the Ly-(alpha) line, or smaller galaxy units which only later merge to form large ellipticals. To place such Ly-(alpha) emitters in the context of galaxy and star formation, we will (1) derive their luminosity function in the Ly-(alpha) line and broad bands (2) estimate their star-formation rates from the UV continuum (3) study their clustering properties from small (10 Kpc) to large (10 Mpc) scales. With the Mosaic+4 meter combination we expect to derive a large enough (500-1500 in a comoving volume of 10^5 Mpc^3 ) sample to do this. Spectroscopy with WIYN/HYDRA for bright (R< 22) emission line sources identified in an earlier run will let us identify the brightest Ly-(alpha) sources from the low-z interlopers, so we can sharpen our broad-band color-redshift selection criteria, characterize the star formation rates of z< 1 emission line galaxies, and study the Ly- (alpha) line-profile to understand gas flows and Ly-(alpha) escape mechanism.
Malhotra Sangeeta
Rhoads James E.
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