Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40537f&link_type=abstract
Spitzer Proposal ID #40537
Other
Scientific paper
Lyman-Break Galaxies (LBGs) and Submillimeter Galaxies (SMGs) are star-forming galaxies at high-redshifts, selected in very different ways. A large amount of spectroscopic data are now available for LBGs, and consequently we have an increasingly meaninful understanding of their physical properties. By contrast SMGs (i.e., high-redshift ULIRGs) are notoriously faint and difficult to identify at visible wavelengths, making it extremely hard even to measure their redshifts. However, we have recently discovered (Huang etal 2005) a population that links LBGs and SMGs: Infrared-Luminous Lyman Break Galaxies (ILLBGs). ILLBGs strongly resemble SMGs in the infrared, yet are surprisingly bright at visible wavelengths. This permits 1.) high S/N study of their rest-frame UV spectra, 2.) measurement of differences in physical properties between normal blue LBGs and ILLBGs, and 3.) comparison of ILLBGs to their local ULIRG/LIRG couterparts. We have recently completed a new, large photometric survey for LBGs in the Extended Groth Strip (EGS) field, in which we detected 6500 LBG candidates. Amoung these, 220 have clear detections in the MIPS 24 micron band -- in other words, they are ILLBGs. This is the largest ULIRG/LIRG sample at z=3 in existence. We ask for four nights of GMOS time to carry out a spectroscopic study of this important population that links LBGs and SMGs.
Ashby Matt
Fazio Giovanni
Huang Jiasheng
Marcillac Delphine
Papovich Casey
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