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Light-Echo Spectrum Reveals the Type of Tycho Brahe's 1572 Supernova

机译：光回声谱显示Tycho Brahe的1572 Supernova的类型

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We successfully obtained the first optical spectra of the faint light echoes around Cassiopeia A and Tycho Brahe's supernova remnants (SNRs) with FOCAS and the Subaru Telescope. We conclude that Cas A and Tycho's SN 1572 belong to the Type IIb and normal Type Ia supernovae, respectively. Light echo spectra are important in order to obtain further insight into the supernova explosion mechanism of Tycho's SN 1572: how the Type Ia explosion actually proceeds, and whether accretion occurs from a companion or by the merging of two white dwarfs. The proximity of the SN 1572 remnant has allowed detailed studies, such as the possible identification of the binary companion, and provides a unique opportunity to test theories of the explosion mechanism and the nature of the progenitor. Future light-echo spectra, obtained in different spatial directions of SN 1572, will enable to construct a three-dimensional spectroscopic view of the explosion.
机译：我们成功获得了Cassiopeia A和Tycho Brahe的超新星残余（SNRS）周围的微弱光呼应的第一光谱，与焦点和斯图拉乌望远镜。我们得出结论，CAS A和Tycho的SN 1572分别属于IIB型和正常型超新星。光回波光谱很重要，以便进一步了解Tycho的Sn 1572的超新星爆炸机制：IA型爆炸的实际情况如何，以及accetion是否发生在伴侣或两个白矮星的合并中发生。 SN 1572残留的接近允许详细研究，例如可能识别二元伴侣，并提供了测试爆炸机制理论和祖先性质的独特机会。在SN 1572的不同空间方向上获得的未来光学回波光谱将使能够构建爆炸的三维光谱视图。

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