Institute of Astronomy

The Formation of High-Redshift Submillimetre Galaxies 

SpeakerTalk DateTalk Series
Desika Narayanan, Harvard10 December 2009Institute of Astronomy Colloquia


Submillimetre Galaxies at z~2 are the most luminous, heavily
star-forming galaxies in the Universe. While observers have been
rapidly amassing clues regarding this enigmatic population, the mere
existence of these galaxies has remained a sticking point for
theoretical models. In explaining their observed properties, theorists
have required varied physical deviancies from local Universe
phenomena. I will argue that extraordinary physics is unnecessary to
explain this population.  In this talk, I will present a merger-driven
model that describes the formation and evolution of SMGs which
accurately reproduces the observed UV-mm wave SED, the inferred
physical properties of the population, and the observed number counts.
This model provides a natural connection between SMGs, 24 micron
sources, and BzK galaxies, thus providing some synthesis to the zoo of
galaxies being detected at high-z. Finally, I will describe model
distinguishing tests which will be feasible with the next generation
of telescopes (Herschel, JWST and ALMA).


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