Magnetic field structure around low-mass class 0 protostars : B335, L1527, and IC348-SMM2

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DOIResolve DOI: http://doi.org/10.1088/0004-637X/732/2/97
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TypeArticle
Journal titleThe Astrophysical Journal
ISSN0004-637X
Volume732
Issue2
Article number97
Pages97-1
SubjectSM: jets and outflows; ISM: magnetic fields; stars: formation; techniques: polarimetric
AbstractWe report new 350 μm polarization observations of the thermal dust emission from the cores surrounding the low-mass, Class 0 young stellar objects L1527, IC348-SMM2, and B335. We have inferred magnetic field directions from these observations and have used them together with results in the literature to determine whether magnetically regulated core-collapse and star formation models are consistent with the observations. These models predict a pseudo-disk with its symmetry axis aligned with the core magnetic field. The models also predict a magnetic field pinch structure on a scale less than or comparable to the infall radii for these sources. In addition, if the core magnetic field aligns (or nearly aligns) the core rotation axis with the magnetic field before core collapse, then the models predict the alignment (or near alignment) of the overall pinch field structure with the bipolar outflows in these sources. We show that if one includes the distorting effects of bipolar outflows on magnetic fields, then in general the observational results for L1527 and IC348-SMM2 are consistent with these magnetically regulated models. We can say the same for B335 only if we assume that the distorting effects of the bipolar outflow on the magnetic fields within the B335 core are much greater than for L1527 and IC348-SMM2. We show that the energy densities of the outflows in all three sources are large enough to distort the magnetic fields predicted by magnetically regulated models.
Publication date
PublisherIOP Publishing
LanguageEnglish
AffiliationNational Research Council Canada; NRC Herzberg Institute of Astrophysics
Peer reviewedYes
NPARC number19770574
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Record identifier1a3b95a0-2906-4f0f-a564-887ed1b41793
Record created2012-04-04
Record modified2016-07-18
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