THE RETURN OF THE BOW SHOCK

被引:25
|
作者
Scherer, K. [1 ]
Fichtner, H. [1 ]
机构
[1] Ruhr Univ Bochum, Inst Theoret Phys 4, D-44780 Bochum, Germany
来源
ASTROPHYSICAL JOURNAL | 2014年 / 782卷 / 01期
关键词
atomic processes; hydrodynamics; ISM: atoms; stars:; winds; outflows; Sun: heliosphere; LOCAL INTERSTELLAR-MEDIUM; SOLAR-WIND; TERMINATION SHOCK; INNER HELIOSPHERE; LO OBSERVATIONS; PICKUP IONS; HELIUM; PARAMETERS; PLASMA; SPECTROSCOPY;
D O I
10.1088/0004-637X/782/1/25
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Recently, whether a bow shock ahead of the heliospheric stagnation region exists or not has been a topic of discussion. This was triggered by measurements indicating that the Alfven speed and the speed of fast magnetosonic waves are higher than the flow speed of the local interstellar medium (LISM) relative to the heliosphere and resulted in the conclusion that either a bow wave or a slow magnetosonic shock might exist. We demonstrate here that including the He+ component of the LISM yields both an Alfven and fast magnetosonic wave speed lower than the LISM flow speed. Consequently, the scenario of a bow shock in front of the heliosphere, as modeled in numerous simulations of the interaction of the solar wind with the LISM, remains valid.
引用
收藏
页数:5
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