期刊
ASTROPHYSICAL JOURNAL
卷 605, 期 2, 页码 656-661出版社
IOP PUBLISHING LTD
DOI: 10.1086/382670
关键词
galaxies : active; galaxies : individual (NGC 6251); galaxies : jets; ISM : jets and outflows; MHD; quasars : individual (3C 345)
There is growing evidence that relativistic jets in active galactic nuclei undergo extended (parsec-scale) acceleration. We argue that, contrary to some suggestions in the literature, this acceleration cannot be purely hydrodynamic. Using exact semianalytic solutions of the relativistic MHD equations, we demonstrate that the parsec-scale acceleration to relativistic speeds inferred in sources such as the radio galaxy NGC 6251 and the quasar 3C 345 can be attributed to magnetic driving. Additional observational implications of this model will be explored in future papers in this series.
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