Magnetic accretion disks fall into two types

Details Magnetic accretion disks fall into two types Magnetic accretion disks fall into two types

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..295s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 10, 1990, p. 295-299.

Astronomy and Astrophysics

Astrophysics

55

Accretion Disks, Magnetic Flux, Magnetohydrodynamic Stability, Active Galactic Nuclei, Nonlinear Equations, X Ray Binaries

Scientific paper

It is demonstrated through nonlinear numerical simulations that there are two kinds of magnetic accretion disks. One is a high-beta disk, called a solar-type disk, where magnetic flux escapes from the disk due to magnetic buoyancy (or Parker) instability to produce a (low-beta) hot corona surrounding the disk. The second type of disk is a low-beta disk, called a magnetically cataclysmic disk, where magnetic flux cannot fully escape from the disk because the nonlinear escape time of magnetic flux is longer than the amplification time of magnetic flux by Keplerian shear motions. In this disk magnetic fields are increased enormously by the shear motion up to a point, beyond which explosive (or cataclysmic) phenomena occur which suddenly release magnetic energy from the disk. Possible transitions between the two types of disks and implications for cataclysmic variables, X-ray binaries, and active galactic nuclei are discussed.

Affiliated with

Also associated with

No associations

Rating

Magnetic accretion disks fall into two types does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnetic accretion disks fall into two types, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic accretion disks fall into two types will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1841453