caa a22 4500 445345799 CHVBK 20180317142828.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11207-010-9510-y doi (NATIONALLICENCE)springer-10.1007/s11207-010-9510-y Solar Flux Emergence Simulations [Elektronische Daten] [R. Stein, A. Lagerfjärd, Å. Nordlund, D. Georgobiani] We simulate the rise through the upper convection zone and emergence through the solar surface of initially uniform, untwisted, horizontal magnetic flux, with the same entropy as the nonmagnetic plasma, that is advected into a domain 48Mm wide by 20Mm deep. The magnetic field is advected upward by the diverging upflows and pulled down in the downdrafts, which produces a hierarchy of loop-like structures of increasingly smaller scale as the surface is approached. There are significant differences between the behavior of fields of 10kG and 20 or 40kG strength at 20Mm depth. The 10kG fields have little effect on the convective flows and show small magnetic-buoyancy effects, reaching the surface in the typical fluid rise time from 20Mm depth of 32 hours. 20 and 40kG fields significantly modify the convective flows, leading to long, thin cells of ascending fluid aligned with the magnetic field and their magnetic buoyancy makes them rise to the surface faster than the fluid rise time. The 20kG field produces a large-scale magnetic loop that as it emerges through the surface leads to the formation of a bipolar, pore-like structure. The Author(s), 2010 Sun nationallicence Dynamics nationallicence Magnetic fields nationallicence Magneticfluxemergence nationallicence Convection nationallicence Stein R. Michigan State University, East Lansing, MI, USA aut Lagerfjärd A. Astronomical Observatory/Niels Bohr Institute, Juliane Maries Vej 30, 2100, Copenhagen, Denmark aut Nordlund Å. Astronomical Observatory/Niels Bohr Institute, Juliane Maries Vej 30, 2100, Copenhagen, Denmark aut Georgobiani D. Michigan State University, East Lansing, MI, USA aut Solar Physics Springer Netherlands 268/2(2011-02-01), 271-282 0038-0938 268:2<271 2011 268 11207 https://doi.org/10.1007/s11207-010-9510-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9510-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stein R. Michigan State University, East Lansing, MI, USA aut NATIONALLICENCE 700 1- Lagerfjärd A. Astronomical Observatory/Niels Bohr Institute, Juliane Maries Vej 30, 2100, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Nordlund Å. Astronomical Observatory/Niels Bohr Institute, Juliane Maries Vej 30, 2100, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Georgobiani D. Michigan State University, East Lansing, MI, USA aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 268/2(2011-02-01), 271-282 0038-0938 268:2<271 2011 268 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer