The First IRS Spectrum of a Lyman Break Galaxy

Details The First IRS Spectrum of a Lyman Break Galaxy The First IRS Spectrum of a Lyman Break Galaxy

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30832s&link_type=abstract

Spitzer Proposal ID #30832

Computer Science

Scientific paper

A significant portion of the star-formation in the high redshift universe resides in the ultraviolet-luminous Lyman Break Galaxies (LBGs). Although they are UV bright, the bulk of their luminosities are emitted in the far-infrared (FIR). Unlike the population of luminous infrared galaxies (LIRGs and ULIRGs), LBGs are typically too faint in the MIR to for Spitzer spectroscopy. We propose deep IRS spectroscopy of the lensed Lyman-Break Galaxy (LBG) MS1512-cB58. The factor of ~30 magnification provides the only opportunity to obtain a MIR spectrum of a typical (L*) LBG. We will measure the strength of the PAH features, allowing a comparison with Lbol as measured from longer wavelength photometry. We will also fit the shape of the warm dust (VSG) continuum and compare it to expectations from the IRAC-to-MIPS70 SED.

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