Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Liverts, Edward"'
In this paper it is shown that deferentially rotating disks that are in the presence of weak axial magnetic field are prone to a new nonlinear explosive instability. The latter occurs due to the near-resonance three-wave interactions of a magnetorota
Externí odkaz:
http://arxiv.org/abs/1509.06339
The equations that govern the weakly nonlinear near-resonant interaction of a parent magnetorotational instability with two linearly stable daughter modes in thin nonuniform magnetized Keplerian discs are derived. While the equations for the daughter
Externí odkaz:
http://arxiv.org/abs/1408.6442
The magneto-rotational decay instability (MRDI) of thin Keplerian discs threaded by poloidal magnetic fields is introduced and studied. The linear magnetohydrodynamic problem decouples into eigenvalue problems for in-plane slow- and fast- Alfv'een-Co
Externí odkaz:
http://arxiv.org/abs/1401.2528
The saturation of the magnetorotational (MRI) instability in thin Keplerian disks through three wave resonant interactions is introduced and discussed. That mechanism is a natural generalization of the fundamental decay instability discovered five de
Externí odkaz:
http://arxiv.org/abs/1307.6193
Publikováno v:
Phys. Rev. Lett. 109, 224501, 2012
A new non-dissipative mechanism is proposed for the saturation of the axisymmetric magnetorotational (MRI) instability in thin Keplerian disks that are subject to an axial magnetic field. That mechanism relies on the energy transfer from the MRI to s
Externí odkaz:
http://arxiv.org/abs/1210.5343
The linear stability of thin vertically-isothermal density-stratified Keplerian discs in toroidally-dominated magnetic fields is treated by asymptotic expansions in the small aspect ratio of the discs. The discs are found to be spectrally stable. The
Externí odkaz:
http://arxiv.org/abs/1109.4719
Linear instability of two equilibrium configurations with either poloidal (I) or toroidal (II) dominant magnetic field components are studied in thin vertically-isothermal Keplerian discs. Solutions of the stability problem are found explicitly by as
Externí odkaz:
http://arxiv.org/abs/1009.5598
Publikováno v:
MNRAS 404 Issue 1 (2010) 283-288
A linear stability analysis of ionized discs with a temperature gradient and an external axial magnetic field is presented. It is shown that both hydromagnetic and thermomagnetic effects can lead to the amplification of waves and make discs unstable.
Externí odkaz:
http://arxiv.org/abs/1001.0277
Autor:
Liverts, Edward, Mond, Michael
Publikováno v:
MNRAS, 392, (2009), Issue 1, pp. 287-293
A detailed solution of an initial value problem of a vertically localized initial perturbation in rotating magnetized vertically stratified disk is presented. The appropriate linearized MHD equations are solved by employing the WKB approximation and
Externí odkaz:
http://arxiv.org/abs/0810.1864
Publikováno v:
Astron. Nachr., 329, No. 8, 845--848 (2008)
Cool weakly ionized gaseous rotating disk form the basis for many models in astrophysics objects. Instabilities against perturbations in such disks play an important role in the theory of the formation of stars and planets. Traditionally, axisymmetri
Externí odkaz:
http://arxiv.org/abs/0806.3855