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The Case For Substantial Dust Extinction At z ~ 3 | | Gerhardt R. Meurer
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18 Aug 1997 | | Subject: | astro-ph | | Affiliation: | The Johns Hopkins University | | Abstract: | Estimates of the total metal production rate (dot{
ho}_Z) 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 dot{
ho}_Z. Two tests are proposed to further constrain dot{
ho}_Z at these redshifts. | | Source: | arXiv, astro-ph/9708163 | | Services: | Forum | Review | PDF | Favorites | |
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