Left: radial profiles of the pseudo-electron density, thermal pressure, and entropy. In the top panel, the orange region indicates the electron density from the Planck result of Planck Collaboration VIII (2013). Right: radial entropy profiles for A399 (red) and A401, respectively. Crosses show the results from Chandra observations (Cavagnolo et al. 2009). The solid line represents the empirical model K(r) = K0 + K100(r/ 100 kpc)α. We adopt the best-fit parameters from (Cavagnolo et al. 2009), i.e., K0:A399 = 153.20,K100:A399 = 204.34,αA399 = 0.79, K0:A401 = 166.80,K100:A401 = 81.79,αA401 = 1.40, respectively.
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