naa a22 4500 51079016X CHVBK 20180411083317.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1134/S1063773713030055 doi (NATIONALLICENCE)springer-10.1134/S1063773713030055 Prudskikh V. Institute of Physics, Southern Federal University, pr. Stachki 194, 334090, Rostov-on-Don, Russia aut Zones of anomalous activity of the magnetorotational instability in protostellar disks [Elektronische Daten] [V. Prudskikh] A criterion for the magnetorotational instability of a protostellar disk in which the dust particles are assumed to be well mixed with the gas over the entire disk volume has been obtained within the framework of Hall magnetohydrodynamics. It is shown that the dusty plasma component affects significantly the Hall current and, under certain conditions, can cause its direction to be reversed compared to the case of a weakly ionized electron-ion plasma. A significant expansion of the range of wave numbers for unstable magnetic fluctuations is a consequence of the Hall current reversal. The spatial localization of the regions of protostellar disks in which not only the long-wavelength Alfvén disturbances but also the short-wavelength ones are subject to the magnetorotational instability is investigated. Possible physical consequences of the presence of anomalously active zones in cold disks for their structure and evolution are pointed out. Pleiades Publishing, Ltd., 2013 magnetohydrodynamics nationallicence protostellar disks nationallicence Astronomy Letters SP MAIK Nauka/Interperiodica 39/3(2013-03-01), 192-200 1063-7737 39:3<192 2013 39 11443 https://doi.org/10.1134/S1063773713030055 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713030055 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Prudskikh V. Institute of Physics, Southern Federal University, pr. Stachki 194, 334090, Rostov-on-Don, Russia aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/3(2013-03-01), 192-200 1063-7737 39:3<192 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer