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Published May 10, 2013 | Published
Journal Article Open

Misalignment of Magnetic Fields and Outflows in Protostellar Cores


We present results of λ1.3 mm dust-polarization observations toward 16 nearby, low-mass protostars, mapped with ~2."5 resolution at CARMA. The results show that magnetic fields in protostellar cores on scales of ~1000 AU are not tightly aligned with outflows from the protostars. Rather, the data are consistent with scenarios where outflows and magnetic fields are preferentially misaligned (perpendicular), or where they are randomly aligned. If one assumes that outflows emerge along the rotation axes of circumstellar disks, and that the outflows have not disrupted the fields in the surrounding material, then our results imply that the disks are not aligned with the fields in the cores from which they formed.

Additional Information

© 2013 American Astronomical Society. Received 2013 February 22; accepted 2013 March 28; published 2013 April 25. We thank the referee for insightful comments. C.L.H.H. thanks Chris McKee, Richard Klein, Mark Krumholz, and Andrew Myers for a helpful discussion, and acknowledges the advice and guidance of the members of the Berkeley Radio Astronomy Laboratory and the Berkeley Astronomy Department. C.L.H.H. acknowledges support from an NSF Graduate Fellowship. J.D.F. acknowledges support from an NSERC Discovery grant. J.J.T. acknowledges support provided by NASA through Hubble Fellowship grant #HST-HF-51300.01-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. A.D.B. acknowledges support from a CAREER grant NSF-AST0955836, NSF-AST1139998, and a Research Corporation for Science Advancement Cottrell Scholar award. Support for CARMA construction was derived from the states of California, Illinois, and Maryland, the James S. McDonnell Foundation, the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the University of Chicago, the Associates of the California Institute of Technology, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement, and by the CARMA partner universities.

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