在正常 Ia 型超新星中探测到星周物质
天体物理学
2014-11-18 v1
摘要
Ia 型超新星被认为是吸积白矮星达到临界质量极限时发生的热核爆炸。尽管它们作为宇宙学距离指示器非常重要，但其前身星的性质一直存在争议。在此，我们报告在一颗正常的 Ia 型超新星中探测到了星周物质。星周包层的膨胀速度、密度和尺寸表明，该物质是从前身星系统中抛射出来的。相对较低的膨胀速度似乎支持这样一种前身星系统：白矮星从一颗在爆炸时处于红巨星阶段的伴星吸积物质。
引用
@article{arxiv.0707.2793,
title = {Detection of circumstellar material in a normal Type Ia Supernova},
author = {F. Patat and P. Chandra and R. Chevalier and S. Justham and Ph. Podsiadlowski and C. Wolf and A. Gal-Yam and L. Pasquini and I. A. Crawford and P. A. Mazzali and A. W. A. Pauldrach and K. Nomoto and S. Benetti and E. Cappellaro and N. Elias-Rosa and W. Hillebrandt and D. C. Leonard and A. Pastorello and A. Renzini and F. Sabbadin and J. D. Simon and M. Turatto},
journal= {arXiv preprint arXiv:0707.2793},
year = {2014}
}
备注
25 pages, 7 figures. Accepted for publication in Science. Full resolution version at http://www.hq.eso.org/~fpatat/science/sn06X/preprint.pdf . The original paper can be found at http://www.sciencemag.org/cgi/content/abstract/1143005