Detection of a magnetized disk around a very young protostar

Ramprasad Rao, Josep M. Girart, Shih Ping Lai, Daniel P. Marrone

Research output: Contribution to journalArticlepeer-review

74 Scopus citations


We present subarcsecond resolution polarimetric observations of the 878 μm thermal dust continuum emission obtained with the Submillimeter Array toward 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.

Original languageEnglish (US)
Article numberL6
JournalAstrophysical Journal Letters
Issue number1
StatePublished - Jan 1 2014


  • ISM: magnetic fields
  • ISM:individual objects (IRAS 16293 2422)
  • polarization
  • stars: formation
  • techniques: polarimetric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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