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- W3172279040 abstract "We report the Herschel/SPIRE detection of dust emission arising from UV-luminous (L L*) star-forming galaxies at 3.3 z 4.3. Our sample of 1913 Lyman break galaxy (LBG) candidates is selected over an area of 5.3?deg2 in the Bo?tes field of the NOAO Deep Wide-Field Survey. This is one of the largest samples of UV-luminous galaxies at this epoch and enables an investigation of the bright end of the galaxy luminosity function. We divide our sample into three luminosity bins and stack the Herschel/SPIRE data to measure the average spectral energy distribution (SED) of LBGs at far-infrared (FIR) wavelengths. We find that these galaxies have average IR luminosities of (3-5) ? 1011 L ? and 60%-70% of their star formation obscured by dust. The FIR SEDs peak at ?rest 100 ?m suggesting dust temperatures (Td = 27-30 K) significantly colder than that of local galaxies of comparable IR luminosities. The observed IR-to-UV luminosity ratio (IRX ? L IR/L UV) is low (3-4) compared with that observed for z 2 LBGs (IRXz ~ 2 7.1 ? 1.1). The correlation between the slope of the UV continuum and IRX for galaxies in the two lower luminosity bins suggests dust properties similar to those of local starburst galaxies. However, the galaxies in the highest luminosity bin appear to deviate from the local relation, suggesting that their dust properties may differ from those of their lower-luminosity and low-redshift counterparts. We speculate that the most UV-luminous galaxies at this epoch are being observed in a short-lived and young evolutionary phase." @default.
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- W3172279040 date "2013-01-01" @default.
- W3172279040 modified "2023-09-25" @default.
- W3172279040 title "Herschel Detection of Dust Emission from UV-Luminous Star-Forming Galaxies at 3.3<z<4.3" @default.
- W3172279040 hasPublicationYear "2013" @default.
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