旧超新星尘埃工厂在银河系中心发现
Old supernova dust factory revealed at the Galactic center
摘要：
超新星喷出物中的尘埃形成是目前解释在遥远的早期宇宙中观察到的大量尘埃的主要候选者。然而，目前还不清楚喷出物形成的尘埃是否能在超新星遗迹（SNR）的高温内部存活下来。我们目前的红外观测~0.02 $M_\odot$的温暖（~100 K）的尘埃看到附近的中心的~10,000岁的Sgr A东SNR在银河系中心。我们的研究结果表明，在一个较老的SNR，是扩大到一个相对密集的周围介质（$n_e$ ~ 100 $\mathrm{cm}^{-3}$），并已幸存下来的反向冲击通过灰尘的检测。结果表明，超新星可能确实是早期宇宙星系致密环境中主要的尘埃产生机制。
英文摘要：
Dust formation in supernova ejecta is currently the leading candidate to explain the large quantities of dust observed in the distant, early Universe. However, it is unclear whether the ejecta-formed dust can survive the hot interior of the supernova remnant (SNR). We present infrared observations of ~0.02 $M_\odot$ of warm (~100 K) dust seen near the center of the ~10,000 yr-old Sgr A East SNR at the Galactic center. Our findings signify the detection of dust within an older SNR that is expanding into a relatively dense surrounding medium ($n_e$ ~ 100 $\mathrm{cm}^{-3}$) and has survived the passage of the reverse shock. The results suggest that supernovae may indeed be the dominant dust production mechanism in the dense environment of early Universe galaxies.
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