In the galaxy cluster IGR J17448-3232, the central intracluster medium has an electron temperature of 13 to 15 keV but an iron-line ionization temperature of only 8 to 10 keV, implying a non-ionization equilibrium state likely caused by a line-of-sight merger.
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Characterization of diffuse X-ray emission from IGR~J17448-3232: an implication of a line of sight merging activity
In the galaxy cluster IGR J17448-3232, the central intracluster medium has an electron temperature of 13 to 15 keV but an iron-line ionization temperature of only 8 to 10 keV, implying a non-ionization equilibrium state likely caused by a line-of-sight merger.