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arXiv · astro-ph/9811194

The Cosmic Infrared Background Radiation, Star Formation Rate, and Metallicity

Martin Harwit
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Abstract

The density of the far infrared / submillimeter (FIR/SMM) diffuse extragalactic radiation field has recently been determined from COBE data. Nearly simultaneously, deep FIR/SMM surveys have detected substantial numbers of optically unidentified sources, which have led to the proposal that galaxies and protogalaxies at red shifts z = 2 to 4 may account for an appreciable fraction of the background. Here, I show that, if the reported radiation levels are generated through nucleosynthesis, most of this energy must have been produced at epochs $z \lesssim 2$. Hubble Deep Field data cited by Madau et al. (1998) indicate that the bulk of the integrated extragalactic background must have been generated even more recently at $z < 1$.

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Martin Harwit. 1998-11-12. The Cosmic Infrared Background Radiation, Star Formation Rate, and Metallicity. https://doi.org/10.1086/311812

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