论文标题
通过分析$ tess $ shock-cool-cooling Light曲线来揭示SN 2021ZBY的祖先
Revealing the progenitor of SN 2021zby through analysis of the $TESS$ shock-cooling light curve
论文作者
论文摘要
我们提出了对双峰型IIB超新星（SN IIB）2021ZBY的早期观察和分析。 $ TESS $在爆炸后的第一个$ \ sim $ \ sim中捕获了SN 2021ZBY的突出的早期冲击冷却峰，并以30分钟的节奏爆炸。我们提出了SN 2021ZBY的光学和近红外光谱系列，包括在冲击冷却阶段的三个光谱。使用多波段模型拟合，我们发现其祖细胞的推断特性与红色的超级巨人或黄色超级巨头一致，信封质量为$ \ sim $ 0.3-3.0 m $ $ _ \ odot $，以及一个$ \ sim $ 50-350 $ r_ r_ r_ r_ \ odot $ r_ \ odot $。这些推断的祖细胞特性与具有双峰功能的其他SNE IIB相似，例如SNE 1993J，2011DH，2016GKG和2017JGH。这项研究进一步验证了高节奏和早期覆盖在解决冲击冷却光曲线形状方面的重要性，而多带观测值（尤其是紫外线）也需要完全限制祖细胞性质。
We present early observations and analysis of the double-peaked Type IIb supernova (SN IIb) 2021zby. $TESS$ captured the prominent early shock cooling peak of SN 2021zby within the first $\sim$10 days after explosion with a 30-minute cadence. We present optical and near-infrared spectral series of SN 2021zby, including three spectra during the shock cooling phase. Using a multi-band model fit, we find that the inferred properties of its progenitor are consistent with a red supergiant or yellow supergiant, with an envelope mass of $\sim$0.3-3.0 M$_\odot$ and an envelope radius of $\sim$50-350$ R_\odot$. These inferred progenitor properties are similar to those of other SNe IIb with double-peak feature, such as SNe 1993J, 2011dh, 2016gkg and 2017jgh. This study further validates the importance of the high cadence and early coverage in resolving the shape of the shock cooling light curve, while the multi-band observations, especially UV, is also necessary to fully constrain the progenitor properties.
