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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Current sheets in comet 67P/Churyumov-Gerasimenko’s coma
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Current sheets in comet 67P/Churyumov-Gerasimenko’s coma

机译：目前在彗星的表67年进入丘留莫夫-格拉西缅p /昏迷

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The Rosetta Plasma Consortium (RPC) data are used to investigate the presence of current sheets in the coma of comet 67P/Churyumov-Gerasimenko. The interaction of the interplanetary magnetic field (IMF) transported by the solar wind toward the outgassing comet consists amongst others of mass loading and field line draping near the nucleus. The draped field lines lead to so-called nested draping because of the constantly changing direction of the IMF. It is shown that the draping pattern is strongly variable over the period of one month. Nested draping results in neighbouring regions with oppositely directed magnetic fields, which are separated by current sheets. Selected events on 5 and 6 June 2015 are studied, which show that there are strong rotations of the magnetic field with associated current sheets that have strengths from several tens up to hundreds of nA/m~2. Not all discussed current sheets show the characteristic peak in plasma density at the centre of the sheet, which might be related to the presence of a guide field. There is no evidence for different kinds of plasmas on either side of a current sheet, and no strongly accelerated ions have been observed which could have been an indication of magnetic reconnection in the current sheets. Plain Language Summary The solar wind, consisting of plasma and magnetic field, cannot uninhabited flow past an active comet. The interaction of the gas coming out of the comet, which gets ionized, and the solar wind leads to a slowing down of the latter, and the magnetic field gets draped around the nucleus of the comet. As the solar wind magnetic field is not constant over time, there will be layers of different directions draped on top of each other, which leads to the generation of current sheets. In this paper the strength of the currents is determined, and signatures of possible magnetic reconnection are looked for but were not found.
机译：罗塞塔等离子财团(RPC)使用数据调查当前表的存在67 / churyumov - gerasimenko彗星的昏迷。行星际磁场的相互作用(IMF)由太阳风向运输除气的彗星和其他由质量加载和细胞核附近的场线覆盖。搭电场线导致所谓的嵌套隔音材料,因为不断变化国际货币基金组织的方向。在覆盖模式是强烈变量期一个月。与反向的周边地区由电流的磁场表。研究表明有强劲旋转的磁场有关目前的状况,从几个优势几十到几百个nA / m ~ 2。当前表显示的特征峰等离子体密度板的中心,可能相关的指南字段。等离子体的电流片的两侧,和没有观察到的强烈加速离子这可能是一个迹象表明磁重新连接在当前表。语言总结太阳风,组成的等离子体和磁场,不能无人居住一个活跃的彗星流过去。气体的彗星,它被电离,和太阳风的放缓后者,和周围的磁场被覆盖彗星的核心。磁场不是常数随着时间的推移,将层上还覆盖着不同的方向相互的,这导致了一代当前的表。的电流决定,和签名可能的寻找,但磁场重联也不见了。

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