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首页> 外文期刊>The Astrophysical journal >Scattered-light Echoes From The Historical Galactic Supernovae Cassiopeia A And Tycho (sn 1572)
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Scattered-light Echoes From The Historical Galactic Supernovae Cassiopeia A And Tycho (sn 1572)

机译：历史银河超新星仙后座A和第谷（SN 1572）的散射光回声

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摘要

We report the discovery of an extensive system of scattered-light echo arclets associated with the recent supemovae in the local neighborhood of the Milky Way: Tycho (SN 1572) and Cassiopeia A. Existing work suggests that the Tycho SN was a thermonuclear explosion while the Cas A supernova was a core-collapse explosion. Precise classifications according to modern nomenclature require spectra of the outburst light. In the case of ancient SNe, this can only be done with spectroscopy of their light echo, where the discovery of the light echoes from the outburst light is the first step. Adjacent light echo positions suggest that Cas A and Tycho may share common scattering dust structures. If so, it is possible to measure precise distances between historical Galactic supernovae. Ongoing surveys that alert on the development of bright scattered-light echo features have the potential to reveal detailed spectroscopic information for many recent Galactic supernovae, both directly visible and obscured by dust in the Galactic plane.
机译：我们报告发现与银河系当地附近的新近地核有广泛的散射光回声弧形系统的发现：第谷（SN 1572）和仙后座A。现有研究表明，第谷SN是热核爆炸，而Cas超新星是一颗核心坍塌的爆炸。根据现代术语的精确分类需要爆发光的光谱。对于古代的SNe，这只能通过对其光回波进行光谱学来完成，其中从爆发光中发现光回波是第一步。相邻的光回波位置表明，Cas A和第谷可能共享相同的散射尘埃结构。如果这样，则有可能测量历史银河超新星之间的精确距离。正在进行的调查提醒着明亮的散射光回波特征的发展，有可能揭示许多近期银河超新星的详细光谱信息，这些信息可以直接看见，也可以被银河平面上的尘埃所遮盖。

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