Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21941604h&link_type=abstract
American Astronomical Society, AAS Meeting #219, #416.04
Mathematics
Logic
Scientific paper
We present a new and accurate measurement of the spatial clustering of submillimeter galaxies (SMGs), the most powerful starbursts in the Universe. We employ a novel technique using data from the LABOCA ECDFS Submillimeter Survey (LESS) to obtain the linear bias and dark matter halo mass for 870-micron selected SMGs. We find that SMGs at z 2 reside in halos of characteristic mass log(M_halo [M_sun/h]) = 12.8 (+0.3,-0.5), providing support for evolutionary links between SMGs and quasars, and indicating that SMGs evolve into massive early-type galaxies residing in moderate- to high-mass groups. Given the observed halo mass, we demonstrate that the redshift distribution of SMGs can be described remarkably well by the combination of two effects: the cosmological growth of structure and the evolution of the molecular gas fraction in galaxies. We conclude that the powerful starbursts in SMGs likely represent a short-lived but universal phase in massive galaxy evolution, associated with the transition between cold gas-rich, star-forming galaxies and passively evolving systems.
Hickox Ryan C.
LESS Collaboration
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