超新星遗迹G1.9+0.3的射电通量密度演化

Q4 Physics and Astronomy

Chinese Astronomy and Astrophysics Pub Date : 2022-10-01 DOI:10.1016/j.chinastron.2022.11.002

Chen Xin, Sun Xiao-Hui

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引用次数: 0

摘要

对年轻超新星遗迹(SNRs)的射电观测可以揭示SNRs的早期演化。我们选择了银河系中信噪比最小的星系G1.9+0.3作为研究对象。我们整理了目前可用的无线电通量密度，并将它们转换为相同的频率，这就留下了近50年来通量密度的演变。我们发现磁通密度在2008年之前增加，之后下降，意味着磁通密度在150-155年左右达到最大值。我们认为，信噪比的变亮可能是磁场的增加，也可能是高能电子的加速。根据通量密度达到峰值的年龄，结合前面的数值模拟，讨论了超新星的抛射质量和超新星爆炸释放的动能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Evolution of Radio Flux Density of Supernova Remnant G1.9+0.3

Radio observations of young supernova remnants (SNRs) can shed light on the early evolution of SNRs. We selected G1.9+0.3 which is the youngest SNR in the Milky Way Galaxy for a study. We compiled the radio flux densities currently available and converted them to the same frequency, which leaves us the evolution of the flux density for the past nearly 50 years. We found that the flux density increased before 2008 and decreased afterwards, meaning the flux density reaching the maximum at an age of about 150–155 yr. We attributed the brightening of the SNR to the increase of either magnetic field or the accelerated high energy electrons. Based on the age at which the flux density reached the peak, combined with the previous numerical simulation, we discussed the ejecta mass of the supernova and kinetic energy released by the supernova explosion.

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来源期刊

Chinese Astronomy and Astrophysics Physics and Astronomy-Astronomy and Astrophysics

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： The vigorous growth of astronomical and astrophysical science in China led to an increase in papers on astrophysics which Acta Astronomica Sinica could no longer absorb. Translations of papers from two new journals the Chinese Journal of Space Science and Acta Astrophysica Sinica are added to the translation of Acta Astronomica Sinica to form the new journal Chinese Astronomy and Astrophysics. Chinese Astronomy and Astrophysics brings English translations of notable articles to astronomers and astrophysicists outside China.