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A Mathematical Model for an Hourglass Magnetic Field

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arxiv 1302.6913 v1 pith:FGLMX7CU submitted 2013-02-27 astro-ph.GA

classification astro-ph.GA
keywords magnetichourglassderivefieldcoordinatecurrentcylindricalequatorial
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Starting with a mathematical boundary value problem for the magnetic vector potential in an axisymmetric cylindrical coordinate system, we derive a general solution for any arbitrary current distribution using the method of Green's functions. We use this to derive an analytic form for an hourglass magnetic field pattern created by electrical currents that are concentrated near (but not confined within) the equatorial plane of a cylindrical coordinate system. Our solution is not characterized by a cusp at the equatorial plane, as in previous solutions based on a current sheet. The pattern we derive provides a very good fit to hourglass magnetic field patterns emerging from three-dimensional numerical simulations of core formation, and can in principle be used for source-fitting of observed magnetic hourglass patterns.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 21 citations worldwide. Full citation record

  1. ALMA observations of Magnetic Fields in the Massive Star-forming Region IRAS 18360-0537

    astro-ph.GA 2026-07 conditional novelty 6.0 of 10

    An ordered hourglass B-field in IRAS 18360-0537 lies perpendicular to the outflow/rotation axis and is reshaped by rotation, outflow cavity walls, and accretion rather than pure magnetic regulation.

  2. Grain alignment and dust evolution physics with polarisation (GRADE-POL). II. On the physical basis of Serkowski and super-Serkowski polarisation spectra

    astro-ph.GA 2026-06 unverdicted novelty 5.0 of 10

    The paper shows that super-Serkowski UV polarisation excesses can be reproduced by radiative torque alignment boosted by EUV radiation from a super-bubble, with Davis-Greenstein alignment contributing only at the shor...

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