A Limit on the Polarized Anomalous Microwave Emission of Lynds 1622
Abstract
The dark cloud Lynds 1622 is one of a few specific sites in the Galaxy where, relative to observed free-free and vibrational dust emission, there is a clear excess of microwave emission. In order to constrain models for this microwave emission, and to better establish the contribution which it might make to ongoing and near-future microwave background polarization experiments, we have used the Green Bank Telescope to search for linear polarization at 9.65 Ghz toward Lynds 1622. We place a 95.4% upper limit of 88 μK (123 μK at 99.7% confidence) on the total linear polarization of this source averaged over a 1.'3 FWHM beam. Relative to the observed level of anomalous emission in Stokes I these limits correspond to fractional linear polarizations of 2.7% and 3.5%.
Additional Information
© 2009 The American Astronomical Society. Received 2009 January 2; accepted 2009 March 2; published 2009 May 11.Attached Files
Published - Mason2009p4282Astrophys_J.pdf
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Additional details
- Eprint ID
- 15163
- Resolver ID
- CaltechAUTHORS:20090818-152816437
- Created
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2009-09-08Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field