伽玛射线暴后glow的早期光学极化
天体物理学
2009-11-13 v1
摘要
我们报告观测到的伽玛射线暴（GRB）后glow的光学极化，观测时间为初始伽玛射线脉冲发生后203秒，使用 Liverpool 机械镜头上的环形偏振仪器获得。我们对极化百分比给出稳健的（2σ）上限，小于8%，这与后glow开始时的火球减速时间相吻合。在该临界时刻，光学亮度衰减率与低极化水平的组合约束了GRB ejecta的标准模型，排除了发射区存在大规模有序磁场的可能性。
引用
@article{arxiv.astro-ph/0703654,
title = {Early Optical Polarization of a Gamma Ray Burst Afterglow},
author = {Carole G. Mundell and Iain A. Steele and Robert J. Smith and Shiho Kobayashi and Andrea Melandri and Cristiano Guidorzi and Andreja Gomboc and Chris J. Mottram and David Clarke and Alessandro Monfardini and David Carter and David Bersier and .},
journal= {arXiv preprint arXiv:astro-ph/0703654},
year = {2009}
}
备注
8 pages including 1 figure. Accepted for publication in Science; published online 15 March 2007; 10.1126/science.1138484