de Souza, Rafael S. 2009 NMGEC模型产生超强的磁场

主要内容:
non-minimal gravitational-electromagnetic coupling
这种模型下中子星和黑洞都能产生很强的磁场 1e15-1e16Gauss
文中提到了如何通过中性环流产生磁场，包括引文

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Title:		Origin of 1015-1016 G magnetic fields in the central engine of gamma ray bursts
Authors:		de Souza, Rafael S.; Opher, Reuven
Affiliation:		AA(IAG, Universidade de São Paulo, Rua do Matão 1226, Cidade Universitária, CEP 05508-900, São Paulo, SP, Brazil), AB(IAG, Universidade de São Paulo, Rua do Matão 1226, Cidade Universitária, CEP 05508-900, São Paulo, SP, Brazil)
Publication:		Journal of Cosmology and Astroparticle Physics, Issue 02, pp. 022 (2010). (JCAP Homepage)
Publication Date:		02/2010
Origin:		IOP
DOI:		10.1088/1475-7516/2010/02/022
Bibliographic Code:		2010JCAP...02..022D

Abstract

Various authors have suggested that the gamma-ray burst (GRB) central engine is a rapidly rotating, strongly magnetized, ( ~ 10¹⁵-10¹⁶ G) compact object. The strong magnetic field can accelerate and collimate the relativistic flow and the rotation of the compact object can be the energy source of the GRB. The major problem in this scenario is the difficulty of finding an astrophysical mechanism for obtaining such intense fields. Whereas, in principle, a neutron star could maintain such strong fields, it is difficult to justify a scenario for their creation. If the compact object is a black hole, the problem is more difficult since, according to general relativity it has ``no hair" (i.e., no magnetic field). Schuster, Blackett, Pauli, and others have suggested that a rotating neutral body can create a magnetic field by non-minimal gravitational-electromagnetic coupling (NMGEC). The Schuster-Blackett form of NMGEC was obtained from the Mikhail and Wanas's tetrad theory of gravitation (MW). We call the general theory NMGEC-MW. We investigate here the possible origin of the intense magnetic fields ~ 10¹⁵-10¹⁶ G in GRBs by NMGEC-MW. Whereas these fields are difficult to explain astrophysically, we find that they are easily explained by NMGEC-MW. It not only explains the origin of the ~ 10¹⁵-10¹⁶ G fields when the compact object is a neutron star, but also when it is a black hole.

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