Common continuum polarization properties: a possible link between proto-planetary nebulae and Type Ia Supernova progenitors
Common continuum polarization properties: a possible link between proto-planetary nebulae and Type Ia Supernova progenitors
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DOI：
10.1093/mnras/stx1734
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发表时间：
2017-07
影响因子：
4.8
通讯作者：
A. Cikota;F. Patat;S. Cikota;J. Spyromilio;G. Rau
中科院分区：
文献类型：
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作者：
A. Cikota;F. Patat;S. Cikota;J. Spyromilio;G. Rau
高度变红的Ia超新星的视线显示出特殊的连续偏振曲线，向蓝色波长增长，在λmax = 0.4μm处达到峰值，这与任何正常的银河系星星的视线都不一样。我们研究了文献中的渐近巨星分支（AGB）和后AGB恒星样本的连续偏振测量，发现一些原行星状星云（PPNe）的偏振曲线与沿着SN Ia视线观察到的偏振曲线相似。这些极化曲线是由星周尘埃的散射产生的。我们讨论的相似性和可能性，至少有一些超新星Ia可能会爆炸后AGB阶段的二进制伴侣。此外，我们推测，奇特的超新星Ia极化曲线可能提供观测支持的核心退化的祖先模型。
The lines of sight to highly reddened SNe Ia show peculiar continuum polarization curves, growing towards blue wavelengths and peaking at λmax≲0.4μm , like no other sightline to any normal Galactic star. We examined continuum polarization measurements of a sample of asymptotic giant branch (AGB) and post-AGB stars from the literature, finding that some proto-planetary nebulae (PPNe) have polarization curves similar to those observed along SN Ia sightlines. These polarization curves are produced by scattering on circumstellar dust. We discuss the similarity and the possibility that at least some SNe Ia might explode during the post-AGB phase of their binary companion. Furthermore, we speculate that the peculiar SN Ia polarization curves might provide observational support to the core-degenerate progenitor model.