Magnetic spiral arms and galactic outflows
Magnetic spiral arms and galactic outflows
复制标题
磁旋臂和银河流出
DOI:
10.1093/mnrasl/slu156
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Chamandy L
中科院分区:
文献类型:
--
作者:
Chamandy L
Galactic magnetic arms have been observed between the gaseous arms of some spiral galaxies; their origin remains unclear. We suggest that magnetic spiral arms can be naturally generated in the interarm regions because the galactic fountain flow or wind is likely to be weaker there than in the arms. Galactic outflows lead to two countervailing effects: removal of small-scale magnetic helicity, which helps to avert catastrophic quenching of the dynamo, and advection of the large-scale magnetic field, which suppresses dynamo action. For realistic galactic parameters, the net consequence of outflows being stronger in the gaseous arms is higher saturation large-scale field strengths in the interarm regions as compared to in the arms. By incorporating rather realistic models of spiral structure and evolution into our dynamo models, an interlaced pattern of magnetic and gaseous arms can be produced.
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DOI:
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发表时间:
1998
期刊:
影响因子:
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作者:
A. Shukurov
通讯作者:
A. Shukurov
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
D. Moss
通讯作者:
D. Moss
DOI:
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发表时间:
2013
期刊:
影响因子:
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作者:
L. Chamandy;K. Subramanian;A. Shukurov
通讯作者:
A. Shukurov
DOI:
--
发表时间:
1993
期刊:
影响因子:
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作者:
F. Krause;K. Rädler;G. Rüdiger
通讯作者:
G. Rüdiger
DOI:
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发表时间:
1993
期刊:
影响因子:
--
作者:
M. Krause
通讯作者:
M. Krause