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Magnetic fields in massive star forming regions: wide-field NIR polarimetry of M42 and Mon R2

Published online by Cambridge University Press:  01 November 2008

Nobuhiko Kusakabe ,
Motohide Tamura  and
Ryo Kandori
Nobuhiko Kusakabe
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 email: nb.kusakabe@nao.ac.jp
Motohide Tamura
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 email: nb.kusakabe@nao.ac.jp
Ryo Kandori
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 email: nb.kusakabe@nao.ac.jp
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Abstract

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Magnetic fields are believed to play an important role in star formation. We observed M42 and Mon R2 massive star forming regions using the wide-field (8′ × 8′) near-infrared imaging polarimeter SIRPOL in South Africa. Magnetic fields are mapped on the basis of dichroic polarized light from hundreds of young stars embedded in the regions. We found “hourglass shaped” magnetic field structure toward OMC-1 region, which is very consistent with magnetic fields traced by using dust emission polarimetry at sub-mm to FIR wavelengths. In the Mon R2 region, we found “S-shaped” magnetic field structure across the massive protostar IRS 1 and IRS 2. We will present the results of comparison of magnetic fields at NIR with those at other wavelengths.

Keywords

Stars – ISM: individual (M42, Mon R2) – polarization – stars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 97 - 98
Copyright
Copyright © International Astronomical Union 2009

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