Ibn型超新星SN 2019uo中的闪光电离特征
高能天体物理现象
2020-02-12 v1
摘要
我们展示了Ibn型超新星(SN) 2019uo的光度和光谱观测，这是第二颗在其早期光谱中具有闪光电离(He II, C III, N III)特征的SN Ibn。SN 2019uo显示出快速的峰值后光度下降，为0.1 mag d^{-1}，与大多数SNe Ibn相似，但比典型的SN Ibn更暗(M^V_{max} = -18.30 ± 0.24 mag)，并且其颜色演化使其介于SNe Ib和最极端的SNe Ibn之间。SN 2019uo在早期光谱中显示出P-cygni He I特征，该特征逐渐演化并在峰值后变为发射主导。与Ibn子类的其他大多数成员相比，它还显示出更快的线速度演化。其热光曲线可由^{56}Ni + 星周相互作用模型较好地描述。
引用
@article{arxiv.1912.07878,
title = {Flash ionization signatures in the type Ibn supernova SN 2019uo},
author = {Anjasha Gangopadhyay and Kuntal Misra and Daichi Hiramatsu and Shan-Qin Wang and Griffin Hosseinzadeh and Xiaofeng Wang and Stefano Valenti and Jujia Zhang and D. Andrew Howell and Iair Arcavi and G. C. Anupama and Jamison Burke and Raya Dastidar and Koichi Itagaki and Brajesh Kumar and Brijesh Kumar and Long Li and Curtis McCully and Jun Mo and Shashi Bhushan Pandey and Craig Pellegrino and Hanna Sai and D. K. Sahu and Pankaj Sanwal and Avinash Singh and Mridweeka Singh and Jicheng Zhang and Tianmeng Zhang and Xinhan Zhang},
journal= {arXiv preprint arXiv:1912.07878},
year = {2020}
}
备注
14 figures, 4 tables, Accepted for publication in ApJ, Corner plots are put in low resolution due to size limitations, please contact authors for original figure