NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-19 T19:01:18 PDT
Help | Comment | NED Home

For refcode 2000MNRAS.315..269A:
Retrieve 30 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2000MNRAS.315..269A The properties of cooling flows in X-ray luminous clusters of galaxies S. W. Allen Accepted 1999 December 22. Received 1999 October 27; in original form 1998 June 1 ABSTRACT We discuss the X-ray properties of the cooling flows in a sample of 30 highly X-ray luminous clusters of galaxies, observed using the ASCA and ROSAT satellites. We demonstrate the need for multiphase models to consistently explain the spectral and imaging X-ray data for the clusters. The mass deposition rates of the cooling flows, independently determined from the ASCA spectra and ROSAT images, exhibit good agreement and exceed 1000 M_sun_ yr^-1^ in the largest systems. We confirm the presence of intrinsic X-ray absorption in the clusters using a variety of spectral models. The measured equivalent hydrogen column densities of absorbing material are sensitive to the spectral models used in the analysis, varying from average values of a few 10^20^ atom cm^-2^ for a simple isothermal emission model, to a few 10^21^ atom cm^-2^ using our preferred cooling flow models, assuming in each case that the absorber lies in a uniform foreground screen. The true intrinsic column densities are likely to be even higher if the absorbing medium is distributed throughout the clusters. We summarize the constraints on the nature of the X-ray absorber from observations in other wavebands. Much of the X-ray absorption may be caused by dust. Keywords: galaxies: clusters: general - cooling flows - intergalactic medium - X-rays: galaxies
Retrieve 30 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home