从遗忘中拯救：SN ~ 1993 J的{ \it Spitzer}档案数据的详细分析
Rescued from oblivion: detailed analysis of archival {\it Spitzer} data of SN~1993J
摘要：
我们提出了一个广泛的分析，从10到26年后的IIb型SN 1993 J的后期中红外（中红外）演化的基础上档案$-$大多是以前未公布的$-$光度数据的斯皮策空间望远镜与档案IRS光谱。SN 1993 J是研究最好的超新星之一，在各种论文中发表了广泛的，长达十年的多波长数据集;然而，其详细的后期中红外分析仍然在文献中缺失。中红外数据不仅遵循不断冷却的SN喷出物，而且还晚时间尘埃形成和星周相互作用过程。我们提供的证据表明，所观察到的晚时间的中红外SN 1993 J过剩可以描述的存在下，两个组件的本地灰尘的灰尘质量的$\sim(3.5-6.0)\times 10^{-3} M_{\odot}$的情况下，部分硅酸盐为基础的灰尘组合物。这些成分的来源可以是新形成的尘埃颗粒，也可以是通过在其他波长下检测到的持续CSM相互作用对预先存在的尘埃进行加热。如果它是新形成的，尘埃被认为位于未受冲击的内部喷出物和外部冷的致密壳层中，就像在仙后座A残留物中发现的那样，也假设在爆炸后几年内在其他尘埃形成的SNe中。
英文摘要：
We present an extensive analysis of the late-time mid-infrared (mid-IR) evolution of Type IIb SN 1993J from 10 up to 26 years post-explosion based on archival $-$ mostly previously unpublished $-$ photometric data of Spitzer Space Telescope in conjunction with an archival IRS spectrum. SN 1993J is one of the best-studied supernovae (SNe) with an extensive, decade-long multi-wavelength dataset published in various papers; however, its detailed late-time mid-IR analysis is still missing from the literature. Mid-IR data follows not just the continuously cooling SN ejecta but also late-time dust formation and circumstellar interaction processes. We provide evidence that the observed late-time mid-IR excess of SN 1993J can be described by the presence of two-component local dust with a dust mass of $\sim(3.5-6.0)\times 10^{-3} M_{\odot}$ in case of a partly silicate-based dust composition. Source of these components can be either newly-formed dust grains, or heating of pre-existing dust via ongoing CSM interaction detected also at other wavelengths. If it is newly-formed, dust is assumed to be located both in the unshocked inner ejecta and in the outer cold dense shell, just as found in the Cassiopeia A remnant and also assumed in other dust-forming SNe in a few years after explosion.
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