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

  • Nobuhiko Kusakabe (a1), Motohide Tamura (a1), Ryo Kandori (a1) and the IRSF/SIRPOL group

Abstract

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.

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References

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

  • Nobuhiko Kusakabe (a1), Motohide Tamura (a1), Ryo Kandori (a1) and the IRSF/SIRPOL group

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