Other
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3314m&link_type=abstract
ATNF proposal C2375, Semester: April, 2010
Other
Cosmology, Atca
Scientific paper
We propose to search for CO emission from a millimeter-bright, optically-dark dusty star forming galaxy (DSFG) discovered by the South Pole Telescope (SPT), which may be one of the highest redshift members of the submillimeter galaxy (SMG) population. The DSFGs discovered by the SPT are extremely luminous and do not fall into the well-established SMG or ULIRG object classes. Although they appear to be at high redshift, the apparent luminosity implies gravitational magnification or star formation on a scale not yet observed in any galaxy. We have begun a followup program to identify these sources at other wavelengths and ultimately place them in the hierarchy of known star forming galaxies. Here we seek to measure the redshift of a source that lacks an optical counterpart in deep imaging, making it a poor candidate for optical spectroscopy. The adjacent optical objects suggest z>4, which would make it one of the highest redshift galaxies known. These observations will also determine the (apparent) gas mass and CO line width, which may allow us to differentiate between a massive merger event and gravitational lensing as the source of the observed luminosity.
Bleem Lindsey
Carlstrom John
Crawford Thomas
Holzapfel William
Marrone Dan
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