Magnetorotational instability with Hall Effect: one­dimensional model

CECILIA BEJARANO; DANIEL GÓMEZ

Ciudad Autónoma de Buenos Aires

Workshop; High Energy Phenomena in Relativistic Outflows II; 2009

[Proceeding correspondiente al poster titulado "Magnetorotational instability with Hall effect: one-dimensional model"] Accretion disks are formed by matter containing a signficant amount of angular momentum being gravitationally attracted by compact objects. These very interesting astrophysical flows are a powerful mechanism ofconversion of gravitational energy into kinetic energy and radiation, and take place in a variety of objects. Theoretical models of accretion require the generation of small-scale turbulence to enhance the effective viscosity of the flow. Within the framework of magnetohydrodynamics, the Hall effect might become important both in fully ionized low density plasmas and in cold plasmas with a low ionization fraction. We analyze the potential relevance of the Hall effect in the magnetorotational instability and present preliminary results from a one-dimensional toy model.