SN1993J 扩张为何如此减速?
天体物理学
2007-05-23 v1
摘要
迄今为止,SN1993J 是射电超新星中演化被监测得最详尽且最具综合性理论-观测分析潜力的那一例。SN1993J 的类壳结构在射电中呈现出与冲击波激发辐射模型相符的普遍扩张行为,持续了超过 8 年的近圆对称性,除南东部壳片中出现的亮性特征在每一次观测中均被观察到。SN1993J 的光谱从 α = -1 趋于 α = -0.67()。减速的扩张可用单斜率模型良好描述,但显然用双斜率模型更为贴切。还有关于扩张曲线中结构的有趣线索。进行该研究的两个 VLBI 团队的结果表明整体上一致,但也存在一些差异。关于减速细节的光学与 VLBI 结果进行比较后发现仍存一些差异。
引用
@article{arxiv.astro-ph/0207027,
title = {How is really decelerating the expansion of SN1993J?},
author = {J. M. Marcaide and A. Alberdi and M. A. Perez-Torres and J. C. Guirado and L. Lara and E. Ros and P. J. Diamond and F. Mantovani and I. I. Shapiro and K. W. Weiler and R. A. Preston and R. T. Schilizzi and R. A. Sramek and C. Trigilio and S. D. Van Dyk and A. R. Whitney and .},
journal= {arXiv preprint arXiv:astro-ph/0207027},
year = {2007}
}
备注
Proceedings of the 6th European VLBI Network Symposium, Ros E., Porcas R.W., Lobanov A.P., Zensus J.A. (eds.), MPIfR, Bonn, Germany, pp. 239-242 (2002). 4 pages, 6 figures, needs evn2002.cls