从太阳逸出的电子束的X射线探测能力
The x-ray detectability of electron beams escaping from the sun
摘要：
我们研究了电子束在离开低日冕加速点时通过非热X射线韧致辐射向行星际空间发射的可探测性和特征。我们证明了最大的行星际电子束（大于等于10 keV的10^35电子）可以用当前和未来的仪器在X射线中检测到，例如RHESSI或Hinode上的X射线望远镜（XRT）。我们列出了最佳观测条件和光束特性。其中，需要良好的成像（而不是仅仅定位或检测空间综合数据）来进行适当的表征，要求逃逸电子（10 keV以上）的数量：RHESSI>= 3 \times 10^36，Hinode/XRT>=3 \times 10^35，计划于2011年飞行的FOXSI探空火箭>=10^33。此外，我们发现，简单的模拟暗示了日冕软X射线射流可能是传播电子束局部加热的结果。
英文摘要：
We study the detectability and characterization of electron beams as they leave their acceleration site in the low corona toward interplanetary space through their nonthermal X-ray bremsstrahlung emission. We demonstrate that the largest interplanetary electron beams (>=10^35 electrons above 10 keV) can be detected in X-rays with current and future instrumentation, such as RHESSI or the X-Ray Telescope (XRT) onboard Hinode.We make a list of optimal observing conditions and beam characteristics. Amongst others, good imaging (as opposed to mere localization or detection in spatially integrated data) is required for proper characterization, putting the requirement on the number of escaping electrons (above 10 keV) to >= 3 \times 10^36 for RHESSI, >=3 \times 10^35 for Hinode/XRT, and >=10^33 electrons for the FOXSI sounding rocket scheduled to fly in 2011. Moreover, we have found that simple modeling hints at the possibility that coronal soft X-ray jets could be the result of local heating by propagating electron beams.
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