z~1巨射电星系的逆康普顿X射线
Inverse Compton X-rays from Giant Radio Galaxies at z~1
摘要：
我们报告的XMM-牛顿观测三个FR II射电星系的红移在0.85和1.34之间，这表明在射电叶内的扩展扩散X射线发射，可能是由于逆康普顿上散射的宇宙微波背景。在此假设下，通过频谱拟合与档案VLA射电观测，我们得到了一个独立的估计磁场在射电瓣的3C 469.1，并比较它与均分值。我们发现这两个估计之间的一致性，只要在粒子的能量分布的周转发生在一个洛伦兹因子超过~ 250。我们确定的相对论粒子的总能量在所有三个源的无线电发射波瓣的范围在3e 59和8 e59尔格之间。这些X射线源的原子核是强吸收的活动星系核。
英文摘要：
We report XMM-Newton observations of three FR II radio galaxies at redshifts between 0.85 and 1.34, which show extended diffuse X-ray emission within the radio lobes, likely due to inverse-Compton up-scattering of the cosmic microwave background. Under this assumption, through spectrum-fitting together with archival VLA radio observations, we derive an independent estimate of the magnetic field in the radio lobes of 3C 469.1 and compare it with the equipartition value. We find concordance between these two estimates as long as the turnover in the energy distribution of the particles occurs at a Lorentz factor in excess of ~ 250. We determine the total energy in relativistic particles in the radio emitting lobes of all three sources to range between 3e59 and 8e59 erg. The nuclei of these X-ray sources are heavily-absorbed powerful AGN.
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