Journal
ASTRONOMY & ASTROPHYSICS
Volume 372, Issue 2, Pages L37-L40Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20010576
Keywords
galaxies : fundamental parameters, high-redshift, photometry, starburst; submillimeter; ultraviolet : galaxies
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We detect 1.2 mm continuum emission from dust in the gravitationally lensed Lyman break galaxy MS1512+36-cB58. Our detected flux is surprisingly low: relative to local starburst galaxies, cB58 appears to produce somewhat less far-IR emission than its UV reddening predicts. After comparing several different estimates of the source's dust content, we conclude that the apparent discrepancy is most likely related to uncertainty in its UV spectral slope. Alternate scenarios to account for a far-IR deficit which rely on a high dust temperature or differential magnification are less satisfactory. Our result underscores one of the risks inherent in characterizing the cosmic star formation history from rest-UV data alone.
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