One goal of deep field surveys is the star

One goal of deep field surveys is the star - z =1-2, and...

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One goal of deep field surveys is the star-formation history of galaxies as a population, which is clearly linked to morphologies, present-day metallicities, and the unresolved background in the UV and deep infrared. From the HDF data, Madau et al. (1996 MNRAS 283, 1388) presented an estimate of the comoving SFR as a function of redshift, which has since been both elucidated and vilified as the Madau plot , shown here in their Fig. 9 from the ADS: Uncertainties in this history come from the imprecision of optical photometric redshifts at
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Unformatted text preview: z =1-2, and more basic, the poorly-known role of extinction. Extinction is especially important since most of these data sample emitted ultraviolet light. Deep mid- and far-infrared surveys, and radio detections sensitive enough to see non-AGN galaxies, are important in telling whether the apparent broad peak is real or an artifact of dust obscuration at larger redshifts. The verdict is still out on the early SFR history of galaxies....
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This note was uploaded on 11/10/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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