红移z~8.1处的GRB 090423
宇宙学与河外天体物理
2015-05-13 v3 高能天体物理现象
摘要
伽马射线暴(GRB)由罕见类型的大质量恒星爆炸产生。其快速衰减的余辉在光学波段通常足够明亮，以至于可以在宇宙学距离上被探测到。此前，已知GRB的最高红移是z=6.7（GRB 080913），星系最高红移是z=6.96。在此我们报告对GRB 090423的观测及其红移z=8.1^{+0.1}_{-0.3}的近红外光谱测量结果。该暴发生在宇宙年龄仅为当前年龄约4%的时候。其性质与在低/中等红移处观测到的GRB相似，表明在大爆炸后约6亿年产生该暴的机制和前身星与大约100亿年后产生GRB的机制和前身星没有显著差异。
引用
@article{arxiv.0906.1578,
title = {GRB 090423 at a redshift of z~8.1},
author = {R. Salvaterra and M. Della Valle and S. Campana and G. Chincarini and S. Covino and P. D'Avanzo and A. Fernandez-Soto and C. Guidorzi and F. Mannucci and R. Margutti and C. C. Thoene and L. A. Antonelli and S. D. Barthelmy and M. De Pasquale and V. D'Elia and F. Fiore and D. Fugazza and L. K. Hunt and E. Maiorano and S. Marinoni and F. E. Marshall and E. Molinari and J. Nousek and E. Pian and J. L. Racusin and L. Stella and L. Amati and G. Andreuzzi and G. Cusumano and E. E. Fenimore and P. Ferrero and P. Giommi and D. Guetta and S. T. Holland and K. Hurley and G. L. Israel and J. Mao and C. B. Markwardt and N. Masetti and C. Pagani and E. Palazzi and D. M. Palmer and S. Piranomonte and G. Tagliaferri and V. Testa},
journal= {arXiv preprint arXiv:0906.1578},
year = {2015}
}
备注
Published in Nature. The astro-ph paper includes the main text (8 pages, 2 figures) and supplementary material (13 pages, 6 figures)