Open AccessMicrowave Interstellar Medium Emission in the Green Bank Galactic Plane Survey: Evidence for Spinning Dust
Author(s) -
Douglas P. Finkbeiner,
G. I. Langston,
Anthony H. Minter
Publication year - 2004
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/425165
Subject(s) - physics , synchrotron , astrophysics , synchrotron radiation , microwave , thermal emission , galactic plane , cosmic dust , spinning , interstellar medium , astronomy , anisotropy , thermal , galaxy , optics , materials science , meteorology , quantum mechanics , composite material
We observe significant dust-correlated emission outside of H II regions inthe Green Bank Galactic Plane Survey (-4 < b < 4 degrees) at 8.35 and 14.35GHz. The rising spectral slope rules out synchrotron and free-free emission asmajority constituents at 14 GHz, and the amplitude is at least 500 times higherthan expected thermal dust emission. When combined with the Rhodes (2.326 GHz),and WMAP (23-94 GHz) data it is possible to fit dust-correlated emission at2.3-94 GHz with only soft synchrotron, free-free, thermal dust, and anadditional dust-correlated component similar to Draine & Lazarian spinningdust. The rising component generally dominates free-free and synchrotron for\nu >~ 14 GHz and is overwhelmed by thermal dust at \nu > 60 GHz. The currentdata fulfill most of the criteria laid out by Finkbeiner et al. (2002) fordetection of spinning dust.Comment: ApJ in press. 26 pages, 11 figures, figures jpeg compressed to save spac
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