The Mid-Infrared Spectrum of the Lensed Lyman Break Galaxy MS1512-cB58

Details The Mid-Infrared Spectrum of the Lensed Lyman Break Galaxy MS1512-cB58 The Mid-Infrared Spectrum of the Lensed Lyman Break Galaxy MS1512-cB58

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.2401s&link_type=abstract

American Astronomical Society, AAS Meeting #211, #24.01; Bulletin of the American Astronomical Society, Vol. 39, p.774

Astronomy and Astrophysics

Astronomy

Scientific paper

We have obtained a 16 hour Spitzer IRS spectrum of the lensed Lyman Break Galaxy (LBG), MS 1512-cB58 at z=2.73. This is the first rest-frame near- to mid-IR spectrum of a typical L* LBG. We detect emission features from Polycyclic Aromatic Hydrocarbons at 6.2, 7.7, and 8.6 microns, but do not detect the 3.3 micron feature. Both the shape of the underlying continuum and the detected PAH flux ratios agree with the local starburst, galaxy NGC 7714. The implied limit to the f3.3/f6.2 PAH flux ratio is significantly lower than measured in local ULIRGs. We also investigate the reliability of using mid-IR photometry to interpret total infrared luminosities, and thus star formation rates in LBGs.

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