Solar Wind Charge Exchange Contributions to the Diffuse X-Ray Emission

被引：0
作者：
Cravens, T. E. [1 ]
Robertson, I. P. [1 ]
Snowden, S. [2 ]
Kuntz, K. [3 ]
Collier, M. [2 ]
Medvedev, M. [1 ]
机构：
[1] Univ Kansas, Dept Phys & Astron, Malott Hall,1251 Wescoe Hall Dr, Lawrence, KS 66045 USA
[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
来源：
LOCAL BUBBLE AND BEYOND II | 2009年 / 1156卷
基金：
美国国家航空航天局;
关键词：
x-rays; charge exchange; local bubble; heliosphere; solar wind; EXTREME-ULTRAVIOLET EMISSION; ALL-SKY SURVEY; TEMPORAL VARIATIONS; COMET HYAKUTAKE; ROSAT SURVEY; IONS; HELIOSPHERE; DISCOVERY; NEUTRALS; SPECTRA;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Astrophysical x-ray emission is typically associated with hot collisional plasmas, such as the million degree gas residing in the solar corona or in supernova remnants. However, x-rays can also be produced in cooler gas by charge exchange collisions between highly-charged ions and neutral atoms or molecules. This mechanism produces soft x-ray emission plasma when the solar wind interacts with neutral gas in the solar system. Examples of such x-ray sources include comets, the terrestrial magnetosheath, and the heliosphere (where the solar wind interacts with incoming interstellar neutral gas). Heliospheric emission is thought to make a significant contribution to the observed soft x-ray background (SXRB). This emission needs to be better understood so that it can be distinguished from the SXRB emission associated with hot interstellar gas and the galactic halo.
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收藏
页码：37 / +
页数：4
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