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arXiv 1801.04656astro-ph.HEastro-ph.SR
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用偏振光映射星周物质--以M82中的超新星2014 J为例

Mapping Circumstellar Matter with Polarized Light - The Case of Supernova 2014J in M82

Yi Yang, Lifan Wang, Dietrich Baade, Peter J. Brown, Aleksandar Cikota, Misty Cracraft, Peter A. Hoflich, Justyn Maund, Ferdinando Patat, William B. Sparks, Jas… 展开作者

Yi Yang, Lifan Wang, Dietrich Baade, Peter J. Brown, Aleksandar Cikota, Misty Cracraft, Peter A. Hoflich, Justyn Maund, Ferdinando Patat, William B. Sparks, Jason Spyromilio, Heloise F. Stevance, Xiaofeng Wang, J. Craig Wheeler

摘要:

光学偏振测量是探测超新星尘埃环境的一种有效方法。我们在$B$带最大值后的$\sim$ 277天到$\sim$ 1181天的6个历元中获得了M82中超新星(SN)2014 J的带$F475W$、$F606W$和$F775W$的线性HST ACS/WFC偏振测量。在第277天测量的偏振显示出与其他时期的明显偏差。这些差异至少可以归因于距SN $\sim5\times10^{17}$ cm处的星周尘埃$\sim$ 10 $^{-6} M_{\odot}$。这些观测所揭示的散射尘埃颗粒似乎与星际介质中的尘埃一致,正是这些尘埃导致了超新星的大幅变红。这种拱星尘埃的存在对导致SN\,2014 J爆炸的祖先系统设置了强有力的限制;然而,它不能区分单简并和双简并模型。

英文摘要:

Optical polarimetry is an effective way of probing the environment of supernova for dust. We acquired linear HST ACS/WFC polarimetry in bands $F475W$, $F606W$, and $F775W$ of the supernova (SN) 2014J in M82 at six epochs from $\sim$277 days to $\sim$1181 days after the $B$-band maximum. The polarization measured at day 277 shows conspicuous deviations from other epochs. These differences can be attributed to at least $\sim$ 10$^{-6} M_{\odot}$ of circumstellar dust located at a distance of $\sim5\times10^{17}$ cm from the SN. The scattering dust grains revealed by these observations seem to be aligned with the dust in the interstellar medium that is responsible for the large reddening towards the supernova. The presence of this circumstellar dust sets strong constraints on the progenitor system that led to the explosion of SN\,2014J; however, it cannot discriminate between single- and double-degenerate models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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