We present new kinetic-gasdynamic model of the solar wind interaction with the local interstellar medium. The model incorporates several processes suggested by McComas et al. (2009) for the origin of the heliospheric ENA ribbon -- the most prominent feature seen in the all sky maps of heliospheric ENAs discovered by the Interstellar Boundary Explorer (IBEX). The ribbon is a region of enhanced fluxes of ENAs crossing almost the entire sky. Soon after the ribbon's discovery it was realized (McComas et al., 2009) that the enhancement of the fluxes could be in the directions where the radial component of the interstellar magnetic field around the heliopause is close to zero (Schwadron et al., 2009). Our model includes secondary charge exchange of the interstellar H atoms with the interstellar pickup protons outside the heliopause and is a further advancement of the kinetic-gasdynamic model by Malama et al. (2006) where pickup protons were treated as a separate kinetic component. Izmodenov et al. (2009) have shown in the frame of Malama's model that the interstellar pickup protons outside the heliopause maybe a significant source of ENAs at energies above 1 keV. The difference between the current work and that of Izmodenov et al. (2009) is in the assumption of no-scattering for newly created pickup protons outside the heliopause. In this limit the model produces a feature qualitatively similar to the ribbon observed by IBEX.
Very Local Interstellar Medium Revealed by Complete Solar Cycle of Interstellar Neutral Helium Observations with IBEX
星际边界探测器（IBEX）飞行任务中的IBEX-Lo仪器对从非常局部的星际介质（VLISM）穿透日光层的星际中性氦原子进行采样。本文利用华沙试验粒子模型（Warsaw Test Particle Model）模拟了2009 - 2020年IBEX-Lo ISN观测到的氦通量，并与IBEX-Lo观测到的最低三个能量阶的计数率进行了比较。$χ^2$分析表明，ISN氦流来自黄道$(λ,β)=(255.59^{\circ}\pm0.23^{\circ}, 5.14^{\circ}\pm0.08^{\circ})$，速度为$v_\text{HP}=25.86\pm0.21$ km s $^{-1}$，日球顶温度为$T_\text{HP}=7450\pm140$ K.在考虑引力和弹性碰撞的情况下，原始VLISM中远离日球顶的ISN氦速度和温度分别为$v_\text{VLISM}=25.9$ km s $^{-1}$和$T_\text{VLISM}=6150$ K. ISN氦通量在1 AU超过12年的时间演变表明IBEX-Lo探测效率的显着变化，ISN氦原子在日光层中的电离率高于模型中假设的电离率，或者在分析的观测中有额外的不明信号源。然而，我们没有发现任何迹象表明，在分析期间的ISN氦的衍生参数的演变。最后，我们认为，IBEX-Lo的持续运作与星际测绘和加速探测器（IMAP）的重叠将是跟踪VL…
Interstellar neutral helium in the heliosphere from IBEX observations. VI. The He$^+$ density and the ionization state in the Very Local Interstellar Matter
Assessment of energetic neutral He atom intensities expected from the IBEX Ribbon
用星际边界探测器获得的高能中性原子（ENA）的全天空地图显示了一个明亮的弧形带状物。我们比较可能的，但尚未检测到，他ENA发射在两个模型的丝带起源。这些模型最初是为氢ENA开发的。在第一种情况下，电离中性太阳风在太阳层顶外沿星际磁场垂直于视线的方向产生ENA。第二个模型提出了在本地星际云（LIC）和本地气泡（LB）之间的接触层的生产。使用原子和离子之间的相关相互作用将模型重新设计为氦。由此产生的强度与可能的氦ENA从日鞘发射进行比较。在第一个模型中，预期强度约为0.014（cm^2 s sr keV）^-1，即，的量级，而在第二个模型LIC/LB接触层模型中，强度为~（2-7）（cm^2 s sr keV）^-1，即，大几百倍如果IBEX带需要离开日球层的He ENA的源粒子数，那么它在He ENA通量中应该是不可见的，这主要是因为来自中和的太阳风α粒子的母He ENA的供应不足。我们的结论是，He ENA的全天空测量为探测几千AU的本地星际介质提供了很好的前景，并为区分上述带状起源模型创造了可能性。
Three-dimensional Features of the Outer Heliosphere Due to Coupling between the Interstellar and Heliospheric Magnetic Field. V. The Bow Wave, Heliospheric Boundary Layer, Instabilities, and Magnetic Reconnection
