Doubling the Sample of Bright Lensed LBGs Observed by Spitzer

Details Doubling the Sample of Bright Lensed LBGs Observed by Spitzer Doubling the Sample of Bright Lensed LBGs Observed by Spitzer

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50086a&link_type=abstract

Spitzer Proposal ID #50086

Physics

Scientific paper

Observations of galaxies at z=2-3 probe the epoch when star formation in galaxies peaked and the morphologies of galaxies were being set. UV-selected populations like the Lyman break galaxies (LBGs) have been extensively studied at short wavelengths, but in most cases are too faint to permit observations (particularly spectroscopy) in the mid-infrared. We propose new Spitzer observations of five recently discovered LBG-like objects whose apparent fluxes have been strongly boosted by gravitational lensing. By combining IRAC, MIPS, and (irreplaceable) IRS data with our extensive ancillary datasets, we will constrain our targets' star formation histories and stellar masses, bolometric dust luminosities, starburst/AGN bolometric energetics, and degree of similarity with various low-redshift templates. The proposed observations would more than double the number of lensed UV-selected galaxies at high redshift that Spitzer will have observed by the end of its cryogenic mission.

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