Dust‐driven Dynamos in Accretion Disks
نویسندگان
چکیده
منابع مشابه
Dust-driven Dynamos in Accretion Disks
Magnetically driven astrophysical jets are related to accretion and involve toroidal magnetic field pressure inflating poloidal magnetic field flux surfaces. Examination of particle motion in combined gravitational and magnetic fields shows that these astrophysical jet toroidal and poloidal magnetic fields can be powered by the gravitational energy liberated by accreting dust grains that have b...
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We show that radial flows (directed either inward or outward) suppress mean-field dynamo action in a thin disc. Under conditions typical of spiral galaxies, the reduction in the growth rate of the large-scale magnetic field can reach 25–30%. The dynamo-generated galactic magnetic fields themselves can drive radial flows at a rate of order 0.1M yr−1. These radial flows can contribute to the satu...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/591244