X ray opacity in cluster cooling flows

Details X ray opacity in cluster cooling flows X ray opacity in cluster cooling flows

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf..271w&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 271-272 (SEE N93-26706 10-90)

Astronomy and Astrophysics

Astrophysics

1

Cooling Flows (Astrophysics), Galactic Clusters, X Ray Spectra, Brightness, Electron Scattering, Line Spectra, Mathematical Models, Optical Thickness, Photoionization, Radiative Transfer, Turbulence

Scientific paper

We have calculated the emergent x-ray properties for a set of spherically symmetric, steady-state cluster cooling flow models including the effects of radiative transfer. Opacity due to resonant x-ray lines, photoelectric absorption, and electron scattering have been included in these calculations, and homogeneous and inhomogeneous gas distributions were considered. The effects of photoionization opacity are small for both types of models. In contrast, resonant line optical depths can be quite high in both homogeneous and inhomogeneous models. The presence of turbulence in the gas can significantly lower the line opacity. We find that integrated x-ray spectra for the flow cooling now are only slightly affected by radiative transfer effects. However x-ray line surface brightness profiles can be dramatically affected by radiative transfer. Line profiles are also strongly affected by transfer effects. The combined effects of opacity and inflow cause many of the lines in optically thick models to be asymmetrical.

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