论文标题
Supernova 1987a的中红外成像
Mid-infrared imaging of Supernova 1987A
论文作者
论文摘要
Supernova 1987a在50 kpc的距离处是研究年轻的超新星（SN）如何及时演变的理想目标。它的赤道环大约20，000年前被从祖细胞恒星中排出的材料，被SN爆炸波吞没了。冲击热尘环在环上晶粒，以中型（ir）波长发出能量，我们提出了基于地面的10--18 $ $ $ m $ m $ m对SN 1987a戒指的监测，从6067天到12814，以0.5的分辨率为0.5英寸，并在10-30 $ $ $ $M。SOFIA光度法中播放了2000年6月6日的IR摄影（IR）。戒指。震动似乎在很大程度上影响了戒指的东侧。 IR亮度的下降是由于被粉尘颗粒被破坏还是在震后地区冷却，都需要更详细的建模。
At a distance of 50 kpc, Supernova 1987A is an ideal target to study how a young supernova (SN) evolves in time. Its equatorial ring, filled with material expelled from the progenitor star about 20,000 years ago, has been engulfed with SN blast waves. Shocks heat dust grains in the ring, emitting their energy at mid-infrared (IR) wavelengths We present ground-based 10--18$μ$m monitoring of the ring of SN 1987A from day 6067 to 12814 at a resolution of 0.5", together with SOFIA photometry at 10-30 $μ$m. The IR images in the 2000's (day 6067-7242) showed that the shocks first began brightening the east side of the ring. Later, our mid-IR images from 2017 to 2022 (day 10952-12714) show that dust emission is now fading in the east, while it has brightened on the west side of the ring. Because dust grains are heated in the shocked plasma, which can emit X-rays, the IR and X-ray brightness ratio represent shock diagnostics. Until 2007 the IR to X-ray brightness ratio remained constant over time, and during this time shocks seemed to be largely influencing the east side of the ring. However, since then, the IR to X-ray ratio has been declining, due to increased X-ray brightness. Whether the declining IR brightness is because of dust grains being destroyed or being cooled in the post-shock regions will require more detailed modelling.
