Tanaka Masaomi
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Philos Trans A Math Phys Eng Sci. 2017 Oct 28;375(2105). doi: 10.1098/rsta.2016.0273.
Spectropolarimetry is one of the most powerful methods to study the multi-dimensional geometry of supernovae (SNe). We present a brief summary of the spectropolarimetric observations of stripped-envelope core-collapse SNe. Observations indicate that stripped-envelope SNe generally have a non-axisymmetric ion distribution in the ejecta. Three-dimensional clumpy geometry nicely explains the observed properties. A typical size of the clumps deduced from observations is relatively large: [Formula: see text]25% of the photosphere. Such a large-scale clumpy structure is similar to that observed in Cassiopeia A, and suggests that large-scale convection or standing accretion shock instability takes place at the onset of the explosion.This article is part of the themed issue 'Bridging the gap: from massive stars to supernovae'.
分光偏振imetry是研究超新星（SNe）多维几何结构最强大的方法之一。我们简要总结了剥离包层核心坍缩超新星的分光偏振观测结果。观测表明，剥离包层超新星在 ejecta 中通常具有非轴对称的离子分布。三维团块状几何结构很好地解释了观测到的性质。从观测中推断出的团块典型尺寸相对较大：[公式：见正文]光球层的25%。这种大规模的团块状结构类似于在仙后座A中观测到的结构，表明在爆炸开始时发生了大规模对流或驻积激波不稳定性。本文是主题为“弥合差距：从大质量恒星到超新星”的特刊的一部分。
