The Case For Substantial Dust Extinction At z 3
Meurer, Gerhardt R.
Original · EN
Estimates of the total metal production rate (ρZ) and star formation rate at z > 2 are based on Lyman break systems observed in the rest-frame ultraviolet (UV). These observations are very sensitive to dust obscuration. Here I elucidate and refine the Meurer et al. (1997) method for calculating UV obscuration, presenting new relationships which accurately model the dust reprocessing of radiation in local starbursts. The median lambda = 1600 Angstroms obscuration factor is 10 at z 3 which is shown to be consistent with other constraints on the high-z ρZ. Two tests are proposed to further constrain ρZ at these redshifts.
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