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arXiv · 1311.6225

Detection of a Magnetized Disk around a Very Young Protostar

Ramprasad Rao·Josep M. Girart·Shih-Ping Lai·Daniel P. Marrone
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Abstract

We present subarcsecond resolution polarimetric observations of the 878 mum thermal dust continuum emission obtained with the Submillimeter Array (SMA) towards the IRAS 16293-2422 protostellar binary system. We report the detection of linearly polarized dust emission arising from the circumstellar disk associated with the IRAS 16293-2422 B protostar. The fractional polarization of ~1.4$% is only slightly lower than that expected from theoretical calculations in such disks. The magnetic field structure on the plane of the sky derived from the dust polarization suggests a complex magnetic field geometry in the disk, possibly associated with a rotating disk that is wrapping the field lines as expected from the simulations. The polarization around IRAS 16293-2422 A at subarcsecond angular resolution is only marginally detected.

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Ramprasad Rao, Josep M. Girart, Shih-Ping Lai, Daniel P. Marrone. 2013-11-25. Detection of a Magnetized Disk around a Very Young Protostar. https://doi.org/10.1088/2041-8205%2F780%2F1%2Fl6

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