Journal
ASTROPHYSICAL JOURNAL
Volume 559, Issue 2, Pages L105-L108Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/323787
Keywords
dust, extinction; galaxies : distances and redshifts; galaxies : evolution; methods : data analysis; techniques : photometric; ultraviolet : ISM
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We study the evolution of the galaxy UV luminosity density as a function of redshift in the Hubble Deep Field-North (HDF-N). We estimate the amount of energy absorbed by dust and hidden from optical observations by analyzing the HDF-N photometric data with the spectral energy distribution fitting method. According to our results, at redshifts of 1 less than or equal to z less than or equal to 4.5, the global energy observed in the UV rest frame at lambda = 1500 Angstrom corresponds to only 7%-11% of the stellar energy output, the rest of it being absorbed by dust and reemitted in the far-IR. Our estimates of the comoving star formation rate density in the universe from the extinction-corrected UV emission are consistent with the recent results obtained with Submillimeter Common-User Bolometric Array (SCUBA) at faint submillimeter flux levels.
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