SN 2017gmr：一颗具有不对称性且能量充沛的 II-P 型超新星
高能天体物理现象
2019-12-04 v1 太阳与恒星天体物理
摘要
我们给出了从发现后数小时至前 180 天内，对明亮 II-P 型超新星 SN 2017gmr 的高节奏紫外（UV）、光学和近红外（NIR）数据。SN 2017gmr 在早期光学光谱中未显示出窄的高电离发射线迹象，然而其光学光变曲线演化表明，在爆炸后至少 2 天内必然存在来自星周介质（CSM）相互作用的额外能量源。早期光变曲线建模表明其前身星半径约 500R，与相当致密的红超巨星一致；晚期光度表明，若光变曲线仅由放射性衰变供能，则存在高达 0.130 0.026 M 的 Ni，尽管若 CSM 相互作用对平台后光度有贡献，则 Ni 质量可能更低。H 与 [O I] 的显著多峰发射线在第 154 天后出现，这是不对称性爆炸或 CSM 不对称性所致。在可能存在 CSM 相互作用的情况下，爆炸最初两天内缺乏窄线，可能是紧密、致密、不对称的 CSM 被球形超新星抛射物迅速包裹的一个例子。
引用
@article{arxiv.1907.01013,
title = {SN 2017gmr: An energetic Type II-P supernova with asymmetries},
author = {Jennifer E. Andrews and D. J. Sand and S. Valenti and Nathan Smith and Raya Dastidar and D. K. Sahu and Kuntal Misra and Avinash Singh and D. Hiramatsu and P. J. Brown and G. Hosseinzadeh and S. Wyatt and J. Vinko and G. C. Anupama and I. Arcavi and Chris Ashall and S. Benetti and Marco Berton and K. A. Bostroem and M. Bulla and J. Burke and S. Chen and L. Chomiuk and A. Cikota and E. Congiu and B. Cseh and Scott Davis and N. Elias-Rosa and T. Faran and Morgan Fraser and L. Galbany and C. Gall and A. Gal-Yam and Anjasha Gangopadhyay and M. Gromadzki and J. Haislip and D. A. Howell and E. Y. Hsiao and C. Inserra and E. Kankare and H. Kuncarayakti and V. Kouprianov and Brajesh Kumar and Xue Li and Han Lin and K. Maguire and P. Mazzali and C. McCully and P. Milne and Jun Mo and N. Morrell and M. Nicholl and P. Ochner and F. Olivares and A. Pastorello and F. Patat and M. Phillips and G. Pignata and S. Prentice and A. Reguitti and D. E. Reichart and Ó. Rodríguez and Liming Rui and Pankaj Sanwal and K. Sárneczky and M. Shahbandeh and Mridweeka Singh and S. Smartt and J. Strader and M. D. Stritzinger and R. Szakáts and L. Tartaglia and Huijuan Wang and Lingzhi Wang and Xiaofeng Wang and J. C. Wheeler and Danfeng Xang and O. Yaron and D. R. Young and Junbo Zhang},
journal= {arXiv preprint arXiv:1907.01013},
year = {2019}
}
备注
Submitted to ApJ, 25 pages, plus Appendix