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首页> 外文期刊>Space Science Reviews >Revising the Local Bubble Model due to Solar Wind Charge Exchange X-ray Emission
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Revising the Local Bubble Model due to Solar Wind Charge Exchange X-ray Emission

机译：由于太阳风电荷交换X射线的发射，修改了局部气泡模型

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The hot Local Bubble surrounding the solar neighborhood has been primarily studied through observations of its soft X-ray emission. The measurements were obtained by attributing all of the observed local soft X-rays to the bubble. However, mounting evidence shows that the heliosphere also produces diffuse X-rays. The source is solar wind ions that have received an electron from another atom. The presence of this alternate explanation for locally produced diffuse X-rays calls into question the existence and character of the Local Bubble. This article addresses these questions. It reviews the literature on solar wind charge exchange (SWCX) X-ray production, finding that SWCX accounts for roughly half of the observed local 1/4 keV X-rays found at low latitudes. This article also makes predictions for the heliospheric O VI column density and intensity, finding them to be smaller than the observational error bars. Evidence for the continued belief that the Local Bubble contains hot gas includes the remaining local 1/4 keV intensity, the observed local O VI column density, and the need to fill the local region with some sort of plasma. If the true Local Bubble is half as bright as previously thought, then its electron density and thermal pressure are 1/root 2 as great as previously thought, and its energy requirements and emission measure are 1/2 as great as previously thought. These adjustments can be accommodated easily, and, in fact, bring the Local Bubble's pressure more in line with that of the adjacent material. Suggestions for future work are made.
机译：主要通过观察其软X射线的发射来研究围绕太阳附近的热局部气泡。通过将所有观察到的局部软X射线归因于气泡来获得测量结果。但是，越来越多的证据表明，日球层还会产生漫射X射线。源是从另一个原子接收电子的太阳风离子。对于局部产生的漫射X射线的这种替代解释的存在令人质疑局部气泡的存在和性质。本文解决了这些问题。它回顾了有关太阳风电荷交换（SWCX）X射线产生的文献，发现SWCX大约占低纬度观测到的本地1/4 keV X射线的一半。本文还预测了日球O VI柱的密度和强度，发现它们比观测误差棒小。继续相信局部气泡包含热气体的证据包括剩余的局部1/4 keV强度，观察到的局部O VI色谱柱密度以及需要用某种等离子体填充局部区域的证据。如果真正的局部气泡的亮度是以前认为的一半，则其电子密度和热压是以前认为的1 / root 2，并且其能量需求和发射量是以前认为的1/2。这些调整很容易进行，并且实际上使局部气泡的压力与相邻物料的压力更加一致。提出了今后工作的建议。

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