Modelling High-z Galaxies from the far-UV to the far-IR

Details Modelling High-z Galaxies from the far-UV to the far-IR Modelling High-z Galaxies from the far-UV to the far-IR

1998-07-07

arxiv.org/abs/astro-ph/9807064v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, requires moriond.sty. To appear in "Dwarf Galaxies and Cosmology", proceedings of the XVIIIth Rencontres d

Scientific paper

In this paper, we report on a first estimate of the contribution of galaxies to the diffuse extragalactic background from the far-UV to the submm, based on semi--analytic models of galaxy formation and evolution. We conclude that the global multi--wavelength picture seems to be consistent provided a quite important fraction of star--formation be hidden in dust--enshrouded systems at intermediate and high--redshift. We show that, according to such models, galaxies cannot stand as important contributors to the background hydrogen-ionizing flux at high-redshift unless neutral hydrogen absorption sites are clumpy and uncorrelated with star forming regions.We briefly discuss the robustness of such a result.

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