SN 2023ixf 的早期光谱与致密星周介质相互作用
高能天体物理现象
2023-12-14 v2 太阳与恒星天体物理
摘要
我们呈现 SN~2023ixf 在爆炸后 1.18 至 14 天以亚夜间隔光谱观测到的光学光谱演化。我们识别出高电离发射特征——与前身星周围物质相互作用的 signatures——其在前 7 天 fading，同一夜晚内观测的光谱间存在快速演化。我们将所现发射线及其相对强度与其他具早期相互作用的超新星比较，发现首条光谱与 SN~2020pni 和 SN~2017ahn 密切匹配，后期历元与 SN~2014G 匹配。为物理解释观测，我们将其与文献中围绕红超巨星前身星的受限致密星周物质的 CMFGEN 模型比较。我们发现极少模型能重现前几条光谱中观测到的 blended \NC{} 发射线及其此后的快速消失，使之成为独特诊断。由最佳模型，我们发现质量损失率为 \mlunit{}，远超任何稳态风的质损率，尤其对于所探测前身星初始质量范围内的红超巨星。然而这些质量损失率类似于其他具早期星周相互作用超新星所推断的速率。利用窄发射特征消失的相位，我们计算出星周物质外致密半径 与平均星周物质密度 。这与由峰值 \Halpha{} 发射流量算得的星周物质外半径下限 一致。
引用
@article{arxiv.2306.10119,
title = {Early Spectroscopy and Dense Circumstellar Medium Interaction in SN 2023ixf},
author = {K. Azalee Bostroem and Jeniveve Pearson and Manisha Shrestha and David J. Sand and Stefano Valenti and Saurabh W. Jha and Jennifer E. Andrews and Nathan Smith and Giacomo Terreran and Elizabeth Green and Yize Dong and Michael Lundquist and Joshua Haislip and Emily T. Hoang and Griffin Hosseinzadeh and Daryl Janzen and Jacob E. Jencson and Vladimir Kouprianov and Emmy Paraskeva and Nicolas E. Meza Retamal and Daniel E. Reichart and Iair Arcavi and Alceste Z. Bonanos and Michael W. Coughlin and Ross Dobson and Joseph Farah and Lluís Albany and Claudia Gutiérrez and Suzanne Hawley and Leslie Hebb and Daichi Hiramatsu and D. Andrew Howell and Takashi Iijima and Ilya Ilyin and Kiran Jhass and Curtis McCully and Sean Moran and Brett M. Morris and Alessandra C. Mura and Tomás Müller-Bravo and James Munday and Megan Newsome and Maria Th. Pabst and Paolo Ochner and Estefania Padilla Gonzalez and Andrea Pastorello and Craig Pellegrino and Lara Piscarreta and Aravind P. Ravi and Andrea Reguitti and Laura Salo and Jozsef Vinko and Kellie de Vos and J. C. Wheeler and G. Grant Williams and Samuel Wyatt},
journal= {arXiv preprint arXiv:2306.10119},
year = {2023}
}
备注
Published in ApJL