Magnetic field seed generation in plasmas around charged and rotating black holes

作者：Qadir Asghar^*; Asenjo Felipe A; Mahajan Swadesh M

来源：Physica Scripta, 2014, 89(8): 084002.

DOI：10.1088/0031-8949/89/8/084002

• seed magnetic field
• general relativistic drive
• Kerr metric

Previous work by the authors introduced the possibility of generating seed magnetic fields by spacetime curvature and applied it in the vicinity of a Schwarzschild black hole. It was pointed out that it would be worthwhile to consider the effect in other background geometries and particularly in the vicinity of a rotating black hole, which is generically to be expected, astrophysically. In this paper that suggestion is followed up and we calculate generated magnetic field seed due to Reissner-Nordstrom and Kerr spacetimes. The conditions for the drive for the seed of a magnetic field is obtained for charged black holes, finding that in the horizon the drive vanishes. Also, the psi N-force produced by the Kerr black hole is obtained and its relation with the magnetic field seed is discussed, producing a more effective drive.

• 出版日期2014-8