Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942716f&link_type=abstract
American Astronomical Society, AAS Meeting #219, #427.16
Astronomy and Astrophysics
Astronomy
Scientific paper
The Herschel SPIRE instrument samples flux at 250, 350 and 500 um, close to the peak emission of cold dust. Therefore, it preferentially selects active and dusty high-z sources, similar to submillimeter galaxies (the so-called "SCUBA-galaxies"). In this study, we use wide-field H-ATLAS maps to identify rare, extremely red SPIRE sources. Candidates have fluxes that increase from 250 to 350um and from 350 to 500um and are selected from a "difference map" that traces the variance between the 250um and 500um data. Blended contaminats are removed using the highest resolution 250 micron data, thus leaving a sample of rare red sources. If these extreme sources have rest-frame SEDs typical of z 2 SMGs they are expected to lie at z> 5 and represent a uniform selection of high-z dusty galaxies. For lower redshift sources to have such extreme red colors their submillimeter emission must be dominated by cold dust, and they represent a thus-far unexplored population.
Cooray Asantha
Frazer Chris C.
H-ATLAS Team
Mitchell-Wynne Ketron
Wardlow Julie L.
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