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arXiv 1707.09503astro-ph.HE
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超新星1987 A的射电遗迹-更广阔的视野

The Radio Remnant of Supernova 1987A - A Broader View

G. Zanardo, L. Staveley-Smith, C. -Y. Ng, R. Indebetouw, M. Matsuura, B. M. Gaensler, A. K. Tzioumis

摘要:

超新星遗迹(SNRs)是强大的粒子加速器。当超新星(SN)爆炸波通过星周介质(CSM)传播时,电子和质子在冲击波上散射,并通过捕获在磁场中获得能量。加速的粒子产生进一步的磁场波动和局部放大,导致宇宙射线的产生。超新星1987 A的丰富数据提供了SN-CSM相互作用的模板,并根据其光谱特性为射电探测和识别核心塌陷SNe提供了重要指导。在爆炸发生30年后,SNR 1987 A的无线电观测范围从70 MHz到700 GHz。我们回顾了澳大利亚望远镜紧凑阵列(ATCA)和阿塔卡马大型毫米/亚毫米阵列(ALMA)的广泛观测活动,以及其他射电望远镜的后续活动。整个无线电频谱的观测表明残骸形态的快速变化,而目前的ATCA和ALMA观测表明SNR已经进入了一个新的演化阶段。

英文摘要:

Supernova remnants (SNRs) are powerful particle accelerators. As a supernova (SN) blast wave propagates through the circumstellar medium (CSM), electrons and protons scatter across the shock and gain energy by entrapment in the magnetic field. The accelerated particles generate further magnetic field fluctuations and local amplification, leading to cosmic ray production. The wealth of data from Supernova 1987A is providing a template of the SN-CSM interaction, and an important guide to the radio detection and identification of core-collapse SNe based on their spectral properties. Thirty years after the explosion, radio observations of SNR 1987A span from 70 MHz to 700 GHz. We review extensive observing campaigns with the Australia Telescope Compact Array (ATCA) and the Atacama Large Millimeter/submillimeter Array (ALMA), and follow-ups with other radio telescopes. Observations across the radio spectrum indicate rapid changes in the remnant morphology, while current ATCA and ALMA observations show that the SNR has entered a new evolutionary phase.

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