NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-25 T03:12:30 PDT
Help | Comment | NED Home

For refcode 2001MNRAS.324..877A:
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2001MNRAS.324..877A Chandra measurements of the distribution of mass in the luminous lensing cluster Abell 2390 S.W. Allen, S. Ettori and A.C. Fabian Accepted 2000 December 19. Received 2000 December 19; in original form 2000 September 4 ABSTRACT We present spatially resolved X-ray spectroscopy of the luminous lensing cluster Abell 2390, using observations made with the Chandra observatory. The temperature of the X-ray gas rises with increasing radius within the central ~ 200 kpc of the cluster, and then remains approximately isothermal, with kT = 11.5_-1.6_^+1.5^ keV, out to the limits of the observations at r~1.0 Mpc. The total mass profile determined from the Chandra data has a form in good agreement with the predictions from numerical simulations. Using the parametrization of Navarro, Frenk and White, we measure a scale radius r_s_ ~ 0.8 Mpc and a concentration parameter c~3. The best-fitting X-ray mass model is in good agreement with independent gravitational lensing results and optical measurements of the galaxy velocity dispersion in the cluster. The X-ray gas to total mass ratio rises with increasing radius with f_gas_~21 per cent at r=0.9 Mpc. The azimuthally averaged 0.3-7.0 keV surface brightness profile exhibits a small core radius and a clear "break" at r~500 kpc, where the slope changes from S_X_ ~ r^-1.5^ to S_X_ ~ r^-3.6^. The data for the central region of the cluster indicate the presence of a cooling flow with a mass deposition rate of 200-300 M_sun_ yr^-1^ and an effective age of 2-3 Gyr. Keywords: gravitational lensing Q1galaxies: clusters: individual: Abell 2390 cooling flows intergalactic medium X-rays: galaxies: clusters
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

Back to NED Home