naa a22 4500 510732488 CHVBK 20180411082958.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1134/S1063772913080015 doi (NATIONALLICENCE)springer-10.1134/S1063772913080015 Propagation of a fast magnetoacoustic shock wave in the magnetosphere of an active region [Elektronische Daten] [A. Afanasyev, A. Uralov, V. Grechnev] The propagation of a fast magnetoacoustic shock wave the magnetosphere of a solar active region is considered the nonlinear geometrical acoustics approximation. The magnetic field is modeled as a subphotospheric magnetic dipole embedded in the radial field of the quiet corona. The initial parameters of the wave are specified at a spherical surface in the depths of the active region. The wave propagates asymmetrically and is reflected from regions of the strong magnetic field, which results in the radiation of the wave energy predominantly upwards. Substantial gradients in the Alfvén speed facilitate appreciable growth in the wave intensity. Non-linear damping of the wave and divergence of the wave front lead to the opposite effect. Analysis of the joint action of these factors shows that a fast magnetoacoustic perturbation outgoing from an active region can correspond to a shock wave of moderate intensity. This supports the scenario in which the primary source of the coronal wave is an eruptive filament that impulsively expands in the magnetosphere of an active region. Pleiades Publishing, Ltd., 2013 Afanasyev A. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia aut Uralov A. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia aut Grechnev V. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia aut Astronomy Reports Springer US; http://www.springer-ny.com 57/8(2013-08-01), 594-602 1063-7729 57:8<594 2013 57 11444 https://doi.org/10.1134/S1063772913080015 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772913080015 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Afanasyev A. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia aut NATIONALLICENCE 700 1- Uralov A. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia aut NATIONALLICENCE 700 1- Grechnev V. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia aut NATIONALLICENCE 773 0- Astronomy Reports Springer US; http://www.springer-ny.com 57/8(2013-08-01), 594-602 1063-7729 57:8<594 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer