caa a22 4500 445345721 CHVBK 20180317142828.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11207-010-9679-0 doi (NATIONALLICENCE)springer-10.1007/s11207-010-9679-0 Numerical MHD Simulations of Solar Magnetoconvection and Oscillations in Inclined Magnetic Field Regions [Elektronische Daten] [I. Kitiashvili, A. Kosovichev, N. Mansour, A. Wray] The sunspot penumbra is a transition zone between the strong vertical magnetic field area (sunspot umbra) and the quiet Sun. The penumbra has a fine filamentary structure that is characterized by magnetic field lines inclined toward the surface. Numerical simulations of solar convection in inclined magnetic field regions have provided an explanation of the filamentary structure and the Evershed outflow in the penumbra. In this article, we use radiative MHD simulations to investigate the influence of the magnetic field inclination on the power spectrum of vertical velocity oscillations. The results reveal a strong shift of the resonance mode peaks to higher frequencies in the case of a highly inclined magnetic field. The frequency shift for the inclined field is significantly greater than that in vertical-field regions of similar strength. This is consistent with the behavior of fast MHD waves. Springer Science+Business Media B.V., 2010 Sunspots: penumbra, magnetic fields nationallicence Granulation nationallicence Oscillations: solar nationallicence Kitiashvili I. Center for Turbulence Research, Stanford University, 94305, Stanford, CA, USA aut Kosovichev A. Hansen Experimental Physics Laboratory, Stanford University, 94305, Stanford, CA, USA aut Mansour N. NASA Ames Research Center, 94035, Moffett Field, CA, USA aut Wray A. NASA Ames Research Center, 94035, Moffett Field, CA, USA aut Solar Physics Springer Netherlands 268/2(2011-02-01), 283-291 0038-0938 268:2<283 2011 268 11207 https://doi.org/10.1007/s11207-010-9679-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9679-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kitiashvili I. Center for Turbulence Research, Stanford University, 94305, Stanford, CA, USA aut NATIONALLICENCE 700 1- Kosovichev A. Hansen Experimental Physics Laboratory, Stanford University, 94305, Stanford, CA, USA aut NATIONALLICENCE 700 1- Mansour N. NASA Ames Research Center, 94035, Moffett Field, CA, USA aut NATIONALLICENCE 700 1- Wray A. NASA Ames Research Center, 94035, Moffett Field, CA, USA aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 268/2(2011-02-01), 283-291 0038-0938 268:2<283 2011 268 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer