利用ExoMars TGO/NOMAD-UVIS观测研究行星际日冕物质抛射对火星O(1S) 557.7 nm气辉辐射影响的案例研究：首批结果
A case study on the impact of interplanetary coronal mass ejection on the Martian O(1S) 557.7 nm dayglow emission using ExoMars TGO/NOMAD-UVIS observations: First Results
AI总结：
首次利用ExoMars-TGO和MAVEN观测揭示ICME对火星557.7 nm气辉的影响：主峰不变，次峰及高空亮度增强，归因于太阳电子和X射线通量增加。
摘要：
我们首次报道了行星际日冕物质抛射（ICME）对火星大气中近期发现的O($^1$S) 557.7 nm气辉辐射的影响。尽管文献中已有少量关于其季节变化的研究，但迄今为止尚未有人研究ICME对557.7 nm气辉辐射的影响。利用ExoMars-TGO和MAVEN航天器搭载的仪器，我们表明，与宁静时期相比，ICME事件期间主发射峰（75-80 km）未受影响。然而，在次发射峰（110-120 km）和较高高度区域（140-180 km）的亮度中观测到明显增强。该增强归因于太阳电子和X射线通量的增加，增强了电子碰撞过程并导致亮度增强。这些分析对于理解ICME等强烈太阳瞬变事件对火星气辉辐射的作用具有重要意义。
英文摘要：
We report, for the first time, the impact of an interplanetary coronal mass ejection (ICME) on the recently discovered O($^1$S) 557.7 nm dayglow emission in the Martian atmosphere. Although there are only a few studies on the seasonal variation are available in the literature, the impact of ICME on 557.7 nm dayglow emission has not been investigated so far. Using the instruments aboard ExoMars-TGO and MAVEN spacecrafts, we show that the primary emission peak (75-80 km) remains unaffected during the ICME event compared to quiet-times. However, a noticeable enhancement has been observed in the brightness of secondary emission peak (110-120 km) and the upper altitude region (140-180 km). The enhancement is attributed to the increased solar electrons and X-ray fluxes, augmenting the electron-impact process and causing the enhancement in the brightness. These analyses have an implication to comprehend the role of intense solar transients like ICME on the Martian dayglow emissions.
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