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Misalignment of Magnetic Fields and Outflows in Protostellar Cores

Hull, Charles L. H. and Plambeck, Richard L. and Bolatto, Alberto D. and Bower, Geoffrey C. and Carpenter, John M. and Crutcher, Richard M. and Fiege, Jason D. and Franzmann, Erika and Hakobian, Nicholas S. and Heiles, Carl and Houde, Martin and Hughes, A. Meredith and Jameson, Katherine and Kwon, Woojin and Lamb, James W. and Looney, Leslie W. and Matthews, Brenda C. and Mundy, Lee and Pillai, Thushara and Pound, Marc W. and Stephens, Ian W. and Tobin, John J. and Vaillancourt, John E. and Volgenau, N. H. and Wright, Melvyn C. H. (2013) Misalignment of Magnetic Fields and Outflows in Protostellar Cores. Astrophysical Journal, 768 (2). Art. No. 159. ISSN 0004-637X.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bolatto, Alberto D.0000-0002-5480-5686
Bower, Geoffrey C.0000-0003-4056-9982
Carpenter, John M.0000-0003-2251-0602
Tobin, John J.0000-0002-6195-0152
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.
Funding AgencyGrant Number
NSF Graduate FellowshipUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
NASA Hubble FellowshipHST-HF-51300.01-A
NASANAS 5-26555
Cottrell Scholar of Research CorporationUNSPECIFIED
states of California, Illinois, and MarylandUNSPECIFIED
James S. McDonnell FoundationUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Kenneth T. and Eileen L. Norris FoundationUNSPECIFIED
University of ChicagoUNSPECIFIED
Associates of the California Institute of TechnologyUNSPECIFIED
CARMA partner universitiesUNSPECIFIED
Subject Keywords:ISM: magnetic fields; magnetic fields; polarization; stars: formation; stars: magnetic field; stars: protostars
Issue or Number:2
Record Number:CaltechAUTHORS:20130605-073729901
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Official Citation:Misalignment of Magnetic Fields and Outflows in Protostellar Cores Charles L. H. Hull, Richard L. Plambeck, Alberto D. Bolatto, Geoffrey C. Bower, John M. Carpenter, Richard M. Crutcher, Jason D. Fiege, Erica Franzmann, Nicholas S. Hakobian, Carl Heiles, Martin Houde, A. Meredith Hughes, Katherine Jameson, Woojin Kwon, James W. Lamb, Leslie W. Looney, Brenda C. Matthews, Lee Mundy, Thushara Pillai, Marc W. Pound, Ian W. Stephens, John J. Tobin, John E. Vaillancourt, N. H. Volgenau, and Melvyn C. H. Wright doi:10.1088/0004-637X/768/2/159
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38794
Deposited By: Ruth Sustaita
Deposited On:05 Jun 2013 15:04
Last Modified:09 Mar 2020 13:18

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