Spitzer Observations of the Brightest Lensed LBGs

Details Spitzer Observations of the Brightest Lensed LBGs Spitzer Observations of the Brightest Lensed LBGs

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40430a&link_type=abstract

Spitzer Proposal ID #40430

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Scientific paper

On rare occasions, the otherwise very faint Lyman break galaxies (LBGs) are magnified by gravitational lensing to provide exceptional targets for detailed spectroscopic and imaging studies. The primary objective of this proposal is to constrain the star formation histories and stellar masses of the two brightest such objects, estimate their bolometric dust luminosities, distinguish between starburst and AGN bolometric energetics, and compare the detailed rest-frame mid-IR spectra of dust emission and absorption with known low-redshift templates. In particular, the magnification of our targets enables a unique probe of the nature of dust and star formation at high redshift using IRS, which is simply not possible for typical unlensed UV-selected galaxies at similar redshifts. We propose Spitzer IRAC and MIP images and IRS low-resolution spectra of the two newly discovered brightest, lensed LBGs with, using only a modest amount of Spitzer time (24.6 hours).

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