探测硬X射线选巨射电星系中的重启活动
星系天体物理
2020-03-04 v1
摘要
巨射电星系(GRGs)尺寸大于0.7 Mpc，是宇宙中最大的单体天体。迄今为止，其达到如此巨大尺度的原因仍不清楚。一种提出的情形认为它们是喷流活动多次爆发的结果。将INTEGRAL+Swift活动星系核(AGN)样本与射电星表(NVSS、FIRST、SUMSS)进行交叉比对，我们发现22%的源为GRG(比从射电星表选出的比例高四倍)。显著的是，样本中80%显示出射电活动重启的迹象。X射线性质与此情形一致，这些源相对于产生射电瓣的先前活动处于高吸积、高光度状态。
引用
@article{arxiv.1902.01657,
title = {Probing restarting activity in hard X-ray selected giant radio galaxies},
author = {G. Bruni and F. Ursini and F. Panessa and L. Bassani and A. Bazzano and A. J. Bird and E. Chiaraluce and D. Dallacasa and M. Fiocchi and M. Giroletti and L. Hernandez-Garcia and A. Malizia and M. Molina and L. Saripalli and P. Ubertini and T. Venturi},
journal= {arXiv preprint arXiv:1902.01657},
year = {2020}
}
备注
To appear soon as a proceeding of the XXXth IAU General Assembly, Focus Meeting 3 "Radio Galaxies: Resolving the AGN phenomenon"