NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-25 T09:32:26 PDT
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For refcode 2011A&A...526C...1E:
Retrieve 44 NED objects in this reference.
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2011A&A...526C...1E Mass profiles and c - M_DM_ relation in X-ray luminous galaxy clusters (Corrigendum) Ettori, S.; Gastaldello, F.; Leccardi, A.; Molendi, S.; Rossetti, M.; Buote, D.; Meneghetti, M. Abstract. (Abriged) Assuming that the hydrostatic equilibrium holds between the intracluster medium and the gravitational potential, we constrain the NFW profiles in a sample of 44 X-ray luminous galaxy clusters observed with XMM-Newton in the redshift range 0.1-0.3. We evaluate several systematic uncertainties that affect our reconstruction of the X-ray masses. We measure the concentration c200, the dark mass M200 and the gas mass fraction within R500 in all the objects of our sample, providing the largest dataset of mass parameters for galaxy clusters in this redshift range. We confirm that a tight correlation between c200 and M200 is present and in good agreement with the predictions from numerical simulations and previous observations. When we consider a subsample of relaxed clusters that host a Low-Entropy-Core (LEC), we measure a flatter c-M relation with a total scatter that is lower by 40 per cent. From the distribution of the estimates of c200 and M200, with associated statistical (15-25%) and systematic (5-15%) errors, we use the predicted values from semi-analytic prescriptions calibrated through N-body numerical runs and measure {sigma}_8*{OMEGA}_m^(0.60+-0.03)= 0.45+-0.01 (at 2 {sigma} level, statistical only) for the subsample of the clusters where the mass reconstruction has been obtained more robustly, and {sigma}_8*{OMEGA}_m^(0.56+-0.04) = 0.39+-0.02 for the subsample of the 11 more relaxed LEC objects. With the further constraint from the fgas distribution in our sample, we break the degeneracy in the {sigma}_8-{OMEGA}_m plane and obtain the best-fit values {sigma}_8~1.0+-0.2 (0.75+-0.18 when the subsample of the more relaxed objects is considered) and {OMEGA}_m = 0.26+-0.01. Key words: galaxies: clusters: general, X-ray: galaxies: clusters, cosmology: observations, dark matter, intergalactic medium, Errata, addenda
Retrieve 44 NED objects in this reference.
Please click here for ADS abstract

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