Millimeter Source Counts and Spectral Indices Measured with the South Pole Telescope

Details Millimeter Source Counts and Spectral Indices Measured with the South Pole Telescope Millimeter Source Counts and Spectral Indices Measured with the South Pole Telescope

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21336404v&link_type=abstract

American Astronomical Society, AAS Meeting #213, #364.04; Bulletin of the American Astronomical Society, Vol. 41, p.515

Astronomy and Astrophysics

Astronomy

Scientific paper

We present millimeter-wave (mm) number counts and spectral indices from a new survey taken with the 10 m South Pole Telescope located at the Amundsen-Scott South Pole Station in Antarctica. Extragalactic mm sources are expected to be the dominant contaminant in the current generation of fine-scale cosmic microwave background and Sunyaev-Zel'dovich effect experiments. Here we characterize the spectral and flux distributions of mm sources down to a few mJy at 150 and 225 GHz from an 80 square degree field with uniform coverage. Two distinct populations of mm sources are observed, characterized by their spectral indices: (1) a population of bright sources with falling or flat spectra and cm-wave counterparts and (2) a population of sources with positive spectral indices with number counts consistent with previous observations of submillimeter galaxies.

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