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Fig. 2.

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Velocity features of the ICM selected within the z1, z2, z3cut and z5 regions. Left panels: velocity distributions, in terms of fractional contribution of the gas in each velocity bin to the total in the selected region, considering different gas properties f: gas mass (black), EM (orange), Bremsstrahlung-like emissivity (green) or Fe emissivity (blue). Middle panels: velocity-temperature diagrams, color coded by Fe emissivity. Here, the iron emissivity is computed assuming an APEC model for the 6.5−7.1 keV rest-frame energy band comprising the Fe He-like Kα complex. Right panels: theoretical shape of an idealized Fe He-like line centered at 6.7 keV, after the convolution with the gas velocity distribution (blue solid lines), and with an additional smoothing for a representative 3 eV energy resolution (red dashed lines). The flux reported on the y-axis is in arbitrary units.

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