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29 March 2024
 
  » arxiv » astro-ph/0312039

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The Quest for Microwave Foreground X
Angelica de Oliveira-Costa ; Max Tegmark ; R.D. Davies ; Carlos M. Gutierrez ; A.N. Lasenby ; R. Rebolo ; R.A. Watson ;
Date 2 Dec 2003
Journal Astrophys.J. 606 (2004) L89-L92
Subject astro-ph
AffiliationUpenn), Max Tegmark (Upenn), R.D. Davies (NRAL), Carlos M. Gutierrez (IAC), A.N. Lasenby (MRAO), R. Rebolo (IAC), R.A. Watson (NRAL, IAC
AbstractThe WMAP team has produced a foreground map that can account for most of the low-frequency Galactic microwave emission in the WMAP maps, tentatively interpreting it as synchrotron emission. Finkbeiner and collaborators have challenged these conclusions, arguing that the WMAP team "synchrotron" template is in fact not dominated by synchrotron radiation, but by some dust-related Galactic emission process, perhaps spinning dust grains, making dramatically different predictions for its behavior at lower frequencies. By cross-correlating this "synchrotron" template with 10 and 15 GHz CMB observations, we find that its spectrum turns over in a manner consistent with spinning dust emission, falling about an order of magnitude below what the synchrotron interpretation would predict.
Source arXiv, astro-ph/0312039
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