来自银河系内瞬态软伽马射线重复暴的光学和红外耀发
天体物理学
2011-08-17 v1
摘要
软伽马射线重复暴（SGR）是一种罕见的伽马射线瞬变源，偶尔在高能天空中被探测到爆发。它们被认为是由磁星（一种具有极强磁场（约10^(14-15)高斯）的年轻中子星）产生的。在银河系中仅已知三个这样的天体，第四个与大麦哲伦星云中的超新星遗迹N49相关。在这些案例中，无论是伽马射线耀发还是宁静源，都未识别出光学对应体。在此，我们展示了对一个令人费解的天体SWIFT J195509+261406的多波段观测结果，我们在3天时间内探测到其光学波段超过40次耀发事件，以及11天后的一次微弱红外耀发，之后它恢复宁静。我们提出SWIFT J195509+261406是SGR的一个子类成员，其长期X射线辐射本质上是瞬态的。此外，它是首个在光学和近红外波段探测到爆发的SGR，并且可能是“持续性”SGR与暗淡孤立中子星之间的桥梁。
引用
@article{arxiv.0809.4231,
title = {Optical and infrared flares from a transient Galactic soft gamma-ray repeater},
author = {A. J. Castro-Tirado and A. de Ugarte Postigo and J. Gorosabel and M. Jelinek and T. A. Fatkhullin and V. V. Sokolov and P. Ferrero and D. A. Kann and S. Klose and D. Sluse and M. Bremer and J. M. Winters and D. Nuernberger and D. Perez-Ramirez and M. A. Guerrero and J. French and G. Melady and L. Hanlon and B. McBreen and F. J. Aceituno and R. Cunniffe and P. Kubanek and S. Vitek and S. Schulze and A. C. Wilson and R. Hudec and J. M. Gonzalez-Perez and T. Shahbaz and S. Guziy and S. B. Pandey and L. Pavlenko and E. Sonbas and S. A. Trushkin and N. N. Bursov and N. A. Nizhelskij and L. Sabau-Graziati},
journal= {arXiv preprint arXiv:0809.4231},
year = {2011}
}
备注
Version submitted to Nature on 31 Jan 2008. A substantially revised version of this work has been published in Nature, vol. 455 issue 7212 pp 506-509 under the title "Flares from a Galactic magnetar suggest a missing link to dim isolated neutron stars"