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Title:
A Search for the Polarization of Spinning Dust in the Dark Cloud LDN 1622
Authors:
Mason, B.; Robishaw, T.; Finkbeiner, D.
Publication:
Frontiers of Astrophysics: A Celebration of NRAO's 50th Anniversary ASP Conference Series, Vol. 395, Proceedings of the conference held 18-21 June, 2007, at the National Radio Astronomy Observatory, Charlottesville, Virginia, USA. Edited by Alan H. Bridle, James J. Condon, and Garteh C. Hunt., p.373
Publication Date:
08/2008
Origin:
ASP
Bibliographic Code:
2008ASPC..395..373M

Abstract

Numerous observations have shown that the dark cloud LDN 1622 possesses an anomalous, dust-correlated spectrum of microwave emission. The microwave spectrum is consistent with anomalous spectra observed in other, more diffuse, clouds in the Galaxy and could be caused by electric-dipole emission from small, spinning dust grains. Other mechanisms that have been proposed are magnetic-dipole emission from larger, ferrous grains and hard synchrotron, both of which (unlike electric-dipole emission) would could evince significantly higher levels of polarization. We describe results from an ongoing campaign to measure the polarization of LDN 1622 with the Green Bank Telescope at 8 GHz.
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