A Search for the Polarization of Spinning Dust in the Dark Cloud LDN 1622

Details A Search for the Polarization of Spinning Dust in the Dark Cloud LDN 1622 A Search for the Polarization of Spinning Dust in the Dark Cloud LDN 1622

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..395..373m&link_type=abstract

Frontiers of Astrophysics: A Celebration of NRAO's 50th Anniversary ASP Conference Series, Vol. 395, Proceedings of the conferen

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

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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