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To showcase the capabilities of evolved-star science using the instrument modes of SOFIA and the Hubble Space Telescope (HST) comma we propose to use FORCAST and EXES aboard SOFIA comma and WFC3 and COS aboard HST to probe the quickly-evolving symbiotic system HM Sge. We will use SOFIA to probe the dust and the kinematics of the dense circum-stellar material comma and HST to map the gas in the inner nebula and probe the shocked emission. These observations will provide a public dataset that can be used to anchor future observations of HM Sge comma a post-outburst symbiotic Mira that displays a wide and diverse range of active astrophysical phenomena. The observations will also demonstrate the possibilities for future observations of other evolved-star systems.

为展示利用平流层红外天文台（SOFIA）与哈勃空间望远镜（Hubble Space Telescope, HST）的仪器模式开展演化恒星科学研究的能力，我们提议借助SOFIA搭载的傅里叶变换中红外相机（FORCAST）、交叉色散高分辨率光谱仪（EXES），以及HST搭载的宽视场相机3（WFC3）与宇宙起源频谱仪（COS），对快速演化的共生星系统HM Sge进行探测。我们将通过SOFIA观测致密星周物质的尘埃分布与运动学特征，利用HST绘制内部星云的气体分布图并探测激波发射信号。本次观测将生成一套公开数据集，可为后续针对HM Sge的观测研究提供基准锚定——HM Sge作为一颗爆发后共生米拉变星，展现出丰富多样的活跃天体物理现象。此外，此次观测还将为后续其他演化恒星系统的观测研究提供可行示范。