处于相同红移 z = 0.54 的两起 GRB 超新星的故事
宇宙学与河外天体物理
2015-03-17 v1
摘要
我们报告了红移均为 z = 0.54 的长伽马射线暴（GRBs）060729和090618的光学暂现源（OTs）的地面及HST光学观测结果。对于GRB 060729，其光学光变曲线（LCs）中出现了凸起，且OT的晚期宽带光谱能量分布（SEDs）与本地Ic型超新星相似。对于GRB 090618，我们对光学观测的密集采样使我们能够检测到光学LCs中清晰的凸起以及颜色的变化，这些均表明光来自核坍缩SN。这两起事件伴生的SN分别与已知的GRB超新星SN1998bw以及无已知GRB对应体的典型Ic型超新星SN1994I进行了单独比较，在这两种情况下，其亮度和时间演化都更接近SN1998bw。我们还利用了GRB 090618的大量光学和射电数据以及公开的SWIFT-XRT数据，讨论了早期余辉的性质。在简单的喷流状模型框架下，GRB 090618的余辉最好由在 t-to > 0.5 天存在喷流拐折来解释。然后，我们将所有GRB和X射线闪（XRF）伴生SN的静止系峰值V波段绝对星等与大样本的本地Ibc型SN进行了比较，得出结论：当考虑宿主星系消光时，GRB/XRF-SN的峰值星等与非GRB/XRF SN的峰值星等无法区分。
引用
@article{arxiv.1012.1466,
title = {A tale of two GRB-SNe at a common redshift of z = 0.54},
author = {Z. Cano and D. Bersier and C. Guidorzi and R. Margutti and K. M Svensson and S. Kobayashi and A. Melandri and K. Wiersema and A. Pozanenko and A. J. van der Horst and G. G. Pooley and A. Fernandez-Soto and A. J. Castro-Tirado and A. de Ugarte Postigo and M. Im and A. P. Kamble and D. Sahu and J. Alonso-Lorite and G. Anupama and J. L. Bibby and M. J. Burgdorf and N. Clay and P. A. Curran and T. A. Fatkhullin and A. S. Fruchter and P. Garnavich and A. Gomboc and J. Gorosabel and J. F. Graham and U. Gurugubelli and J. Haislip and K. Huang and A. Huxor and M. Ibrahimov and Y. Jeon and Y-B. Jeon and K. Ivarsen and D. Kasen and E. Klunko and C. Kouveliotou and A. LaCluyze and A. J. Levan and V. Loznikov and P. A. Mazzali and A. S. Moskvitin and C. Mottram and C. G. Mundell and P. E. Nugent and M. Nysewander and P. T. O'Brien and W. -K. Park and V. Peris and E. Pian and D. Reichart and J. E. Rhoads and E. Rol and V. Rumyantsev and V. Scowcroft and D. Shakhovskoy and E. Small and R. J. Smith and V. V. Sokolov and R. L. C. Starling and I. Steele and R. G. Strom and N. R. Tanvir and Y. Tsapras and Y. Urata and O. Vaduvescu and A. Volnova and A. Volvach and R. A. M. J. Wijers and S. E. Woosley and D. R. Young},
journal= {arXiv preprint arXiv:1012.1466},
year = {2015}
}
备注
Accepted for publication in MNRAS on Dec 07, 2010. 18 pages, 12 figures, 9 tables