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pro vyhledávání: '"Schultz, Manfred"'
The nonaxisymmetric azimuthal magnetorotational instability is studied for hydromagnetic Taylor-Couette flows between cylinders of finite electrical conductivity. We find that the magnetic Prandtl number Pm determines whether perfectly conducting or
Externí odkaz:
http://arxiv.org/abs/1804.01501
Decades ago S. Lundquist, S. Chandrasekhar, P.H. Roberts and R. J.~Tayler first posed questions about the stability of Taylor-Couette flows of conducting material under the influence of large-scale magnetic fields. These and many new questions can no
Externí odkaz:
http://arxiv.org/abs/1703.09919
Publikováno v:
acc. for publication in Journal of Plasma Physics (2018)
It is demonstrated that the azimuthal magnetorotational instability (AMRI) also works with radially increasing rotation rates contrary to the standard magnetorotational instability for axial fields which requires negative shear. The stability against
Externí odkaz:
http://arxiv.org/abs/1601.01964
The magnetohydrodynamic stability of axially unbounded cylindrical flows is considered which contain a toroidal magnetic background field with the same radial profile as the linear azimuthal velocity. Chandrasekhar (1956) has shown for ideal fluids t
Externí odkaz:
http://arxiv.org/abs/1407.0240
Autor:
Seilmayer, Martin, Galindo, Vladimir, Gerbeth, Gunter, Gundrum, Thomas, Stefani, Frank, Gellert, Marcus, Rüdiger, Günther, Schultz, Manfred, Hollerbach, Rainer
The azimuthal version of the magnetorotational instability (MRI) is a non-axisymmetric instability of a hydrodynamically stable differentially rotating flow under the influence of a purely or predominantly azimuthal magnetic field. It may be of consi
Externí odkaz:
http://arxiv.org/abs/1311.7223
Autor:
Ruediger, Guenther, Gellert, Marcus, Schultz, Manfred, Strassmeier, Klaus G., Stefani, Frank, Gundrum, Thomas, Seilmayer, Martin, Gerbeth, Gunter
Many astrophysical phenomena (such as the slow rotation of neutron stars or the rigid rotation of the solar core) can be explained by the action of the Tayler instability of toroidal magnetic fields in the radiative zones of stars. In order to place
Externí odkaz:
http://arxiv.org/abs/1201.2318
Autor:
Ruediger, Guenther, Schultz, Manfred
The magnetorotational instability (MRI) of differential rotation under the simultaneous presence of axial and azimuthal components of the (current-free) magnetic field is considered. For rotation with uniform specific angular momentum the MHD equatio
Externí odkaz:
http://arxiv.org/abs/0808.0403
Collapse calculations indicate that the hot newly born protoneutron stars (PNS) rotate differentially so that strong toroidal magnetic field components should exist in the outer crust where also the Hall effect appears to be important when the Hall p
Externí odkaz:
http://arxiv.org/abs/0803.1354
Autor:
Stefani, Frank, Gundrum, Thomas, Gerbeth, Gunter, Rüdiger, Günther, Schultz, Manfred, Szklarski, Jacek, Hollerbach, Rainer
Publikováno v:
Phys.Rev.Lett. 97 (2006) 184502
A recent paper [R. Hollerbach and G. Rudiger, Phys. Rev. Lett. 95, 124501 (2005)] has shown that the threshold for the onset of the magnetorotational instability (MRI) in a Taylor-Couette flow is dramatically reduced if both axial and azimuthal magne
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606473
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