Three-Dimensional Local MHD Simulations of High States and Low States in Magnetic Accretion Disks View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1998

AUTHORS

T. Matsuzaki , R. Matsumoto , T. Tajima , K. Shibata

ABSTRACT

Black hole candidates sometimes show a transition between the high (or soft) state and the low (or hard) state. In the low state, low frequency time variations are much larger than the high state. A possible mechanism of the large-amplitude, sporadic time variabilities in the low-state is the magnetic energy release in low-β (β = Pgas/Pmag < 1) disks (Mineshige, Kusunose & Matsumoto 1995). It had been thought that low-β disks cannot exist because buoyant escape of magnetic flux due to the Parker instability may set the lower limit for β inside the disk. Shibata, Tajima & Matsumoto (1990), however, pointed out that in accretion disks, once a low-β disk is formed, it can stay in low-β state partly because the growth rate of the Parker instability decreases when β < 1. They suggested that magnetic accretion disks fall into two types; high-β disks and low-β disks. More... »

PAGES

400-401

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-94-011-4970-9_143

DOI

http://dx.doi.org/10.1007/978-94-011-4970-9_143

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1011319360


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