AAS 202nd Meeting, May 2003
Session 29 Molecular Clouds and the ISM
Poster, Tuesday, May 27, 2003, 10:00am-6:30pm, West Exhbit Hall

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[29.05] High resolution BIMA polarization observations of NGC 7538 IRS1

A. P. Sarma (Eastern Kentucky University), R. M. Crutcher (University of Illinois), S.-P. Lai (JPL), P. Cortes (University of Illinois)

We present high resolution BIMA polarization observations of the star forming region NGC 7538 IRS1. At 230 GHz, we detect polarization above the 3-sigma level toward five independent points in the source. The polarization angles appear to be similar in the eastern and western parts of the source, then rotate around by about 90 degrees toward the central region of the source. We examine various models of magnetic field morphology that could give rise to such a configuration. Also, the polarization decreases with increasing intensity toward the central region of the source, likely indicating that the dust polarization efficiency decreases toward higher density regions in the source.

If you would like more information about this abstract, please follow the link to www.physics.eku.edu/Sarma. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: anuj.sarma@eku.edu

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.