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arXiv 1004.1561astro-ph.SR
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日球界面对日球内星际氢原子分布的影响

Effect of the heliospheric interface on the distribution of interstellar hydrogen atom inside the heliosphere

Olga Katushkina, Vladislav Izmodenov

摘要:

本文讨论星际氢原子(H原子)在日球层中分布的模拟。本文研究了日球界面,即太阳风与本地星际介质相互作用的区域,对太阳附近氢原子分布的影响。在日光层界面的自洽动力学-气体动力学模型的框架中获得的H原子的分布进行了比较,与简化的模型,假设麦克斯韦分布的H原子在终止激波,通常被称为“热”模型。这种比较表明,H原子的分布显着影响的日光层界面不仅在大的日心距离,而且在太阳附近的1-5 AU。因此,为了分析与星际原子的直接或间接测量有关的实验数据,必须考虑日光层界面的影响。在本文中,我们提出了一个新的模型,这是相对简单的,但考虑到所有主要影响的日光层界面。该模型可用于分析不同航天器上获得的后向散射Ly-alpha辐射数据。

英文摘要:

This paper deals with the modeling of the interstellar hydrogen atoms (H atoms) distribution in the heliosphere. We study influence of the heliospheric interface, that is the region of the interaction between solar wind and local interstellar medium, on the distribution of the hydrogen atoms in vicinity of the Sun. The distribution of H atoms obtained in the frame of the self-consistent kinetic-gasdynamic model of the heliospheric interface is compared with a simplified model which assumes Maxwellian distribution of H atoms at the termination shock and is called often as 'hot' model. This comparison shows that the distribution of H atoms is significantly affected by the heliospheric interface not only at large heliocentric distances, but also in vicinity of the Sun at 1-5 AU. Hence, for analysis of experimental data connected with direct or undirect measurements of the interstellar atoms one necessarily needs to take into account effects of the heliospheric interface. In this paper we propose a new model that is relatively simple but takes into account all major effects of the heliospheric interface. This model can be applied for analysis of backscattered Ly-alpha radiation data obtained on board of different spacecraft.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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