SN 2024ggi 的扩展冲击破裂及早期周边星际介质相互作用
高能天体物理现象
2024-08-02 v2
摘要
我们报告了超nova (SN) 2024ggi 的高采样率光度和光谱观测，该事件为Type II SN，具有闪光光谱特征，爆炸发生在约7 Mpc 的NGC 3621 星系中。前30小时的光度曲线演化可由两个幂律指数拟合，22小时后出现拐点，从 天时的 幅度上升至 天时的 幅度。此外，密集采样的颜色曲线显示前几天强烈的蓝色演化，然后以正常的SN II行为演化，随着射电冷却呈现红色演化。这些偏离可能源于与周边星际介质 (CSM) 的相互作用。早期的高、低分辨率光谱清晰显示从首次光谱到 天的高电离闪光特征。从高分辨率光谱中，我们计算出CSM速度为 。我们还看到线强在最早的高分辨率光谱中从1.22天快速演化到1.49天。与CMFGEN模型比较，SN 2024ggi 的爆前质量流失率落在 到 yr 范围内，这与SN 2023ixf 的 derived 值相似。然而，SN 2024ggi 中窄线快速的时间演化 () 可能表明其周边星际介质的空间范围小于SN 2023ixf ()，从而暗示SN 2024ggi 的总 CSM 质量较小。
关键词
引用
@article{arxiv.2405.18490,
title = {Extended Shock Breakout and Early Circumstellar Interaction in SN 2024ggi},
author = {Manisha Shrestha and K. Azalee Bostroem and David J. Sand and Griffin Hosseinzadeh and Jennifer E. Andrews and Yize Dong and Emily Hoang and Daryl Janzen and Jeniveve Pearson and Jacob E. Jencson and M. J. Lundquist and Darshana Mehta and Aravind P. Ravi and Nicolas Meza Retamal and Stefano Valenti and Peter J. Brown and Saurabh W. Jha and Colin Macrie and Brian Hsu and Joseph Farah and D. Andrew Howell and Curtis McCully and Megan Newsome and Estefania Padilla Gonzalez and Craig Pellegrino and Giacomo Terreran and Lindsey Kwok and Nathan Smith and Michaela Schwab and Aidan Martas and Ricardo R. Munoz and Gustavo E. Medina and Ting S. Li and Paula Diaz and Daichi Hiramatsu and Brad E. Tucker and J. C. Wheeler and Xiaofeng Wang and Qian Zhai and Jujia Zhang and Anjasha Gangopadhyay and Yi Yang and Claudia P. Gutierez},
journal= {arXiv preprint arXiv:2405.18490},
year = {2024}
}
备注
23 pages, 15 figures, 4 tables, accepted for publication in ApJL