标题： XMM-Newton反射光栅光谱仪的首次光线测量：HR 1099恒星冠层中逆电离势效应及异常氖丰度的证据 显示英文标题

标题： First Light Measurements with the XMM-Newton Reflection Grating Spectrometers: Evidence for an Inverse First Ionisation Potential Effect and Anomalous Ne A bundance in the Coronae of HR 1099

摘要： 2000年2月，XMM-Newton天文台以HR 1099这一首次观测目标对其进行了大量观测。 反射光栅光谱仪（RGS）积累了总计570千秒的曝光时间。 5至35埃之间的集成X射线光谱质量空前，显示出许多归因于C、N、O、Ne、Mg、Si、S、Fe和Ni元素跃迁的特征。 我们对该系统的平均日冕元素成分进行了深入研究，发现元素丰度强烈依赖于元素的第一电离势（FIP）。 但与太阳日冕情况不同的是，我们发现了反向FIP效应，即相对于氧而言，丰度随FIP增加而增加。 讨论了可能的情况，例如由于富Ne的耀斑事件引起的选择性富集等。 显示英文摘要

摘要： The RS CVn binary system HR 1099 was extensively observed by the XMM-Newton observatory in February 2000 as its first-light target. A total of 570 ks of exposure time was accumulated with the Reflection Grating Spectrometers (RGS). The integrated X-ray spectrum between 5-35 Angstrom is of unprecedented quality and shows numerous features attributed to transitions of the elements C, N, O, Ne, Mg, Si, S, Fe, and Ni. We perform an in-depth study of the elemental composition of the average corona of this system, and find that the elemental abundances strongly depend on the first ionisation potential (FIP) of the elements. But different from the solar coronal case, we find an inverse FIP effect, i.e., the abundances (relative to oxygen) increase with increasing FIP. Possible scenarios, e.g., selective enrichment due to Ne-rich flare-like events, are discussed.