Interplanetary and interstellar dust observed by theWind WAVES electric field instrument
Interplanetary and interstellar dust observed by theWind WAVES electric field instrument
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DOI：
10.1002/2013gl058786
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发表时间：
2014-01-28
影响因子：
5.2
通讯作者：
Kersten, K.
中科院分区：
文献类型：
--
作者：
Malaspina, D. M.;Horanyi, M.;Kersten, K.
本文首次报道了利用风浪电场仪器的数据观测到超高速尘埃粒子撞击Wind航天器的情况。旋转的航天器、幅度触发的高节奏波形采集和电场天线配置的独特组合，使任何航天器都可以使用电场数据首次直接确定尘埃撞击方向。尘埃通量和撞击方向数据表明，观测到的尘埃大约是微米大小，包括星际和星际种群。当在立体声航天器上观察到纳米尘埃并且两个航天器都很接近的时候，风不能探测到纳米半径的尘埃。已确定的撞击方向表明，电场仪器在1AU处探测到的行星际尘埃主要是穿过地球轨道的束缚轨道上的粒子，而不是具有双曲线轨道的尘埃。报道了利用风首次探测尘埃的关键点可以用一种新技术来确定尘埃撞击方向，立体尘埃数据的解释受到了挑战
Observations of hypervelocity dust particles impacting the Wind spacecraft are reported here for the first time using data from the Wind/WAVES electric field instrument. A unique combination of rotating spacecraft, amplitude-triggered high-cadence waveform collection, and electric field antenna configuration allow the first direct determination of dust impact direction by any spacecraft using electric field data. Dust flux and impact direction data indicate that the observed dust is approximately micron-sized with both interplanetary and interstellar populations. Nanometer radius dust is not detected by Wind during times when nanometer dust is observed on the STEREO spacecraft and both spacecraft are in close proximity. Determined impact directions suggest that interplanetary dust detected by electric field instruments at 1 AU is dominated by particles on bound trajectories crossing Earth's orbit, rather than dust with hyperbolic orbits.Key Points First dust detection by Wind is reported Dust impact direction can be determined with a new technique STEREO dust data interpretations are challenged