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23 April 2024

» arxiv » astro-ph/0403183

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Submillimeter Galaxies as Tracers of Mass Assembly at Large M
R. Genzel ; A.J. Baker ; R.J. Ivison ; F. Bertoldi ; A.W. Blain ; S.C. Chapman ; P. Cox ; R.I. Davies ; F. Eisenhauer ; D.T. Frayer ; T. Greve ; M.D. Lehnert ; D. Lutz ; N. Nesvadba ; R. Neri ; A. Omont ; S. Seitz ; I. Smail ; L.J. Tacconi ; M. Tecza ; N.A. Thatte ; R. Bender ;
Date:	8 Mar 2004
Subject:	astro-ph
Abstract:	Luminous submillimeter galaxies (SMGs) have been known for some time to produce a substantial fraction of the far-IR/submillimeter background. New observations show that these systems are not only very luminous, but also very massive. Here we present results from (a) a survey of SMGs’ molecular line emission, which has confirmed Keck optical redshifts and revealed their high gas and dynamical masses; and (b) a detailed case study of the rest-frame optical emission from one SMG, which has revealed its high metallicity and old stellar population. We infer a high z~2.7 comoving number density of galaxies with baryonic masses greater than 10^11 solar masses; this is not accounted for in current semi-analytic models of galaxy evolution.
Source:	arXiv, astro-ph/0403183
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