Twisting Magnetic Fields in the Core Region of Orion Molecular CLOUD-1

Details Twisting Magnetic Fields in the Core Region of Orion Molecular CLOUD-1 Twisting Magnetic Fields in the Core Region of Orion Molecular CLOUD-1

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.268..325c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 268, NO. 2/MAY15, P. 325, 1994

Astronomy and Astrophysics

Astronomy

51

Polarization - Dust, Extinction - Ism: Individual: Omc-1 - Ism: Jets And Outflows - Ism: Magnetic Fields - Infrared: Ism: Lines And Bands

Scientific paper

We present results of imaging polarimetry of the H2 υ = 1-0 S(1) line in the core region of OMC-1. The polarization vectors are produced by dichroic absorption in a medium of aligned grains and therefore follow the direction of the magnetic field in the region. The magnetic field strength estimated from the dispersion of polarization vectors is ˜10 mG, which is sufficient to align the grains via the Davis-Greenstein mechanism. The presence of a twist in the direction of the magnetic field about the self-luminous object IRc2 is clearly seen. We propose a model which requires the magnetic field to be poloidal outside the disc of IRc2, but which develops a significant transverse component close to the disc.

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