Mid Infrared Spectropolarimetry of MWC:349 - a Hydromagnetically Driven Outflow

Details Mid Infrared Spectropolarimetry of MWC:349 - a Hydromagnetically Driven Outflow Mid Infrared Spectropolarimetry of MWC:349 - a Hydromagnetically Driven Outflow

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.247..466a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 247, NO. 3/DEC1, P. 466, 1990

Astronomy and Astrophysics

Astronomy

15

Scientific paper

We present 8-l3-μm spectropolarimetry of the Bep star MWC 349A. The intensity spectrum indicates significantly more obscuration to the infrared source than to the visible object. A polarization peak of 1.5 per cent near 11 μm is interpreted as dichroic absorption by aligned silicate grains which probably lie in the dense disc which has been partially resolved in the near infrared. The position angle of polarization indicates a magnetic field, normal to the plane of this disc and aligned with the bipolar radio structure. We suggest that this magnetic field plays a role in the outflow through magnetic braking of the rotation of the central star.

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