PROBING THE NATURE OF THE HELIOSHEATH WITH THE NEUTRAL ATOM SPECTRA MEASURED BY IBEX IN THE VOYAGER 1 DIRECTION
PROBING THE NATURE OF THE HELIOSHEATH WITH THE NEUTRAL ATOM SPECTRA MEASURED BY IBEX IN THE VOYAGER 1 DIRECTION
复制标题
利用 IBEX 在航行者 1 号方向测量的中性原子光谱探测日鞘的性质
DOI：
10.1088/2041-8205/776/2/l32
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Drake
中科院分区：
文献类型：
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作者：
M. Opher;C. Prested;D. McComas;N. Schwadron;J. Drake
通过将模型化的高能中性原子 (ENA) 光谱与星际边界探测器 (IBEX) 测量的光谱进行比较，我们可以发现，沿着航行者 1 (V1) 轨迹的模型与低能 IBEX 数据最吻合，包括由于准停滞区域中的冲压和磁能或外日鞘中的卡帕离子分布（κ = 2.0）而产生的额外热量。探索的模型是多离子、多流体（MI-MF），它用单独的麦克斯韦分布处理拾取离子和热离子流体。这些效应临时包含在建模的 ENA 中，因为它们不存在于模型中。这些结果表明，IBEX 测量的 ENA 低能谱对日鞘的物理性质以及当前全球模型中传统上不存在的效应敏感。因此，通过将低能 ENA 光谱与模型进行比较，我们有可能探测 V1 和 Voyager 2 (V2) 探测范围以外的位置的日鞘。
We are able to show by comparing modeled energetic neutral atoms (ENAs) spectra to those measured by Interstellar Boundary Explorer (IBEX) that the models along the Voyager 1 (V1) trajectory that best agree with the low energy IBEX data include extra heating due to ram and magnetic energy in the quasi-stagnation region or a kappa ion distribution (with κ = 2.0) in the outer heliosheath. The model explored is the multi-ion, multi-fluid (MI–MF) which treats the pick-up ions and the thermal ion fluids with separate Maxwellian distributions. These effects are included ad hoc in the modeled ENA since they are not present in the model. These results indicate that the low energy spectra of ENAs as measured by IBEX is sensitive to the physical nature of the heliosheath and to effects not traditionally present in current global models. Therefore, by comparing the low energy ENA spectra to models, we can potentially probe the heliosheath in locations beyond those probed by V1 and Voyager 2 (V2).