The Case For Substantial Dust Extinction At z ~ 3

Details The Case For Substantial Dust Extinction At z ~ 3 The Case For Substantial Dust Extinction At z ~ 3

1997-08-18

arxiv.org/abs/astro-ph/9708163v1

Astronomy and Astrophysics

Astrophysics

4 pages Latex (paspconf.sty,psfig.sty), 2 encapsulated postscript figures. To appear in "The Hubble Deep Field, Posters Presen

Scientific paper

Estimates of the total metal production rate (\dot{\rho}_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{\rho}_Z. Two tests are proposed to further constrain \dot{\rho}_Z at these redshifts.

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