Detailed mapping of extreme mass loss with coordinated XMM-NuSTAR observations

Contrary to expectations from current stellar evolutionary models, recentobservations uncovered the ejection of shells of material by massive stars inthe years before the supernova (SN) explosion. The physical mechanism behind theimpulsive mass ejection synchronized with the stellar corecollapse is unclear.Here we propose a coordinated XMMNuSTAR effort to map the evolution of thebroadband Xray spectrum of 1 nearby (d<50 Mpc) strongly interacting SN andenable progress. Our program has the immediate goal to characterize the mediumaround strongly interacting SN, which originate from stellar progenitors withthe most extreme mass loss before explosion. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]

与当前恒星演化模型所预期的结果相反，最近的观测发现，在超新星（SN）爆炸之前数年，质量巨大的恒星会抛射出物质壳层。与恒星核心坍缩同步的脉冲式质量抛射背后的物理机制尚不明确。在此，我们提出一项协调的XMMNuSTAR计划，旨在绘制1个邻近（距离小于50兆 parsec）强烈相互作用超新星的宽带X射线光谱演变图，以促进研究进展。我们的项目具有直接目标，即表征强烈相互作用超新星周围的介质，这些超新星源自于爆炸前具有最极端质量损失的恒星祖先。详情请参阅实际数据。[详情请参阅实际数据。]