Although it has faded by a factor of ∼107, SN 1987A is still bright enough to be observed in almost every band of the electromagnetic spectrum. Today, the bolometric luminosity of the debris is dominated by a far-infrared (∼200μm) continuum from ∼0.5 M⊙ of dust grains in the interior debris. The dust is heated by UV, optical, and near-infrared (NIR) emission resulting from radioactive energy deposition by 44Ti. The optical light of the supernova debris is now dominated by illumination of the debris by X-rays resulting from the impact of the outer supernova envelope with an equatorial ring (ER) of gas that was expelled some 20,000 years before the supernova explosion. X-ray and optical observations trace a complex system of shocks resulting from this impact, whereas radio observations trace synchrotron radiation from relativistic electrons accelerated by these shocks. The luminosity of the remnant is dominated by an NIR (∼20μm) continuum from dust grains in the ER heated by collisions with ions in the X-ra...

中文翻译：

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超新星 1987A 的残余

尽管 SN 1987A 已经衰减了约 107 倍，但它仍然足够明亮，几乎可以在电磁波谱的每个波段都被观察到。今天，碎片的热光度由来自内部碎片中~0.5 M⊙ 尘埃颗粒的远红外（~200μm）连续谱主导。灰尘被 44Ti 的放射性能量沉积产生的紫外线、光学和近红外 (NIR) 辐射加热。超新星碎片的光学光现在主要是由超新星外层包络与赤道环 (ER) 气体撞击产生的 X 射线照射碎片，该气体在超新星爆炸前约 20,000 年被排出。X 射线和光学观测追踪了由这种撞击引起的复杂冲击系统，而无线电观测则追踪来自这些冲击加速的相对论电子的同步加速器辐射。残余物的光度由来自 ER 中的尘埃颗粒的 NIR (~20μm) 连续谱支配，这些粒子通过与 X 射线中的离子碰撞而加热...