AAS 201st Meeting, January, 2003
Session 140. Cosmology: CMB and Reionization
Oral, Thursday, January 9, 2003, 2:00-3:30pm, 613-614

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[140.05] Galactic Microwave Emission from Spinning Dust: The Green Bank Galactic Plane Survey

D. P. Finkbeiner (Princeton University), G. Langston, T. Minter (Green Bank Observatory)

Cosmic Microwave Background (CMB) experiments in recent years have attained a sufficient sensitivity to detect dust-correlated microwave emission at 15-30 GHz from dust in the Milky Way. At such frequencies, this dust-correlated emission dominates free-free, synchrotron, and other foregrounds.

Draine & Lazarian (1998) proposed that this emission might be electric dipole emission from rapidly spinning dust grains. We have recently processed the Green Bank Galactic Plane Survey at 8 and 14 GHz (Langston et al. 2000) to examine the diffuse ISM emission, and found it consistent with the Draine & Lazarian theory, and very inconsistent with free-free or synchrotron emission.

Given this evidence, it is likely that "spinning dust" emission dominates the diffuse ISM emission observed by MAP at 22 GHz.

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