HST Ha obs. of SNR B0509-67.5 in 2006 & 2016

Using Hubble Space Telescope/ACS H{alpha} images of SNR 0509-67.5 taken ~10yr apart, we measure the forward shock (FS) proper motions (PMs) at 231 rim locations. The average...利用两次拍摄间隔约10年的超新星遗迹（Supernova Remnant, SNR）0509-67.5的哈勃空间望远镜（Hubble Space Telescope）/ACS Hα（H-alpha）波段图像，我们在231个边缘位置处测量了正向激波（forward shock, FS）的自行（proper motions, PMs）。平均而言……