摘要
Dear Editors,Active Galactic Nuclei（AGNs）are very effective tools to study the environment both intrinsic to the central black holes of galaxies[1],or absorbing gas distributed along the sight lines.Recently,numerous highly ionized,local（z=0）metal absorption lines were detected in the X-ray spectra of background AGNs[2],providing an important method in probing hot gas and its content in and around our Galaxy.
Dear Editors,Active Galactic Nuclei(AGNs)are very effective tools to study the environment both intrinsic to the central black holes of galaxies[1],or absorbing gas distributed along the sight lines.Recently,numerous highly ionized,local(z=0)metal absorption lines were detected in the X-ray spectra of background AGNs[2],providing an important method in probing hot gas and its content in and around our Galaxy.Of
基金
supported by the National Natural Science Foundation of China (Grant Nos. 11273021 and 11525312)
by Strategic Priority Program "The Emergence of Cosmological Structures" of the China Academy of Sciences (Grant No. XDB09000000)
