PHOTOSPHERIC MOTIONS AND THEIR EFFECTS ON THE CORONA: A NUMERICAL APPROACH

被引：0

作者：

de Jesus, Leandro Filipe Gomes ^{[1
]}

Gudiksen, Boris Vilhelm ^{[1
]}

机构：

[1] Univ Oslo, Inst Theoret Astrophys, N-0315 Oslo, Norway

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 704卷 / 01期

关键词：

stars: coronae; stars: magnetic fields; Sun: corona; Sun: magnetic fields; MAGNETIC NEUTRAL SHEETS; AB-INITIO APPROACH; SOLAR GRANULATION; EVOLVING FIELDS; VELOCITIES; CONVECTION; STARS; DISSIPATION;

D O I：

10.1088/0004-637X/704/1/705

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a number of numerical simulations of the solar corona with the aim of understanding how it responds to different conditions in the photosphere. By changing parameters which govern the motion of the plasma at the photosphere, we study the behavior of the corona, in particular, the effects on the current density generated. A magnetohydrodynamics code is used to run simulations, using a 20 x 20 x 20 Mm(3) box with timespans ranging from one hundred to several hundreds of minutes. All the experiments show a fast initial increase of the current density, followed by a stabilization around an asymptotic value which depends on the photospheric conditions. These asymptotic average current densities as well as the turnover points are discussed.

引用

页码：705 / 714

页数：10

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