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2007MNRAS.374..409S - Mon. Not. R. Astron. Soc., 374, 409-414 (2007/January-2)
An upper limit to polarized submillimetre emission in Arp 220.
SEIFFERT M., BORYS C., SCOTT D. and HALPERN M.
Abstract (from CDS):
We report the results of pointed observations of the prototypical ultraluminous infrared galaxy (ULIRG) Arp 220 at 850µm using the polarimeter on the Submillimetre Common User Bolometer Array instrument on the James Clerk Maxwell Telescope. We find a Bayesian 99 per cent confidence upper limit on the polarized emission for Arp 220 of 1.54 per cent, averaged over the 15-arcsec beam-size. Arp 220 can serve as a proxy for other, more distant such galaxies. This upper limit constrains the magnetic field geometry in Arp 220 and also provides evidence that polarized ULIRGs will not be a major contaminant for next-generation cosmic microwave background polarization measurements.
Abstract Copyright: 2006 Jet Propulsion Laboratory, California Institute of Technology. Journal compilation © 2006 RAS
Journal keyword(s): galaxies: individual: Arp 220 - galaxies: magnetic fields - cosmic microwave background
Simbad objects: 4
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