DOT tomography of the solar atmosphere -: III.: Observations and simulations of reversed granulation

被引：44
作者：
Leenaarts, J
Wedemeyer-Böhm, S
机构：
[1] Univ Utrecht, Sterrekundig Inst, NL-3508 TA Utrecht, Netherlands
[2] Kiepenheuer Inst Sonnenphys, D-79104 Freiburg, Germany
来源：
ASTRONOMY & ASTROPHYSICS | 2005年 / 431卷 / 02期
关键词：
sun : photosphere; sun : chromosphere; sun : magnetic fields;
D O I：
10.1051/0004-6361:20041714
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We compare high-quality image sequences from the Dutch Open Telescope ( DOT) with synthetic image sequences obtained from 3D radiation-hydrodynamics simulations of the solar granulation. In particular, we study the subsonic brightness pattern observed in the wings of Ca II H & K. The simulations reproduce the observed intensity contrast, time scales, and Fourier behaviour rather well. Most differences can be attributed to the resolution difference between the observations and the simulation and the small geometrical extent of the simulation. We conclude that magnetic fields play no major role in the formation of reversed granulation.
引用
收藏
页码：687 / 692
页数：6
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