The spectral signature of the cooling flow in Abell 478

Details The spectral signature of the cooling flow in Abell 478 The spectral signature of the cooling flow in Abell 478

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..431j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 1, 1992, p. 431-440. Research supported by R

Astronomy and Astrophysics

Astrophysics

104

Cooling Flows (Astrophysics), Galactic Clusters, Galactic Mass, Spectral Signatures, X Ray Spectra, Exosat Satellite, Isothermal Processes, Mass Distribution

Scientific paper

X-ray spectra of Abell 478 taken with the Ginga LAC and with the Einstein SSS are presented. The LAC data set an upper limit of about 440 solar masses/yr on the mass disposition rate through the whole cluster if a value for the galactic absorption based on 21-cm observations of H I is adopted. The SSS data strongly require an absorbing column density well in excess of that expected by scaling from 21-cm observations of galactic H I. Data from the LAC, SSS, and HRI taken together imply a mass deposition rate of about 1000 solar masses/yr with an absorption column density of about 4.8 x 10 exp 21/sq cm. The excess absorption may be intrinsic to the cooling flow or due to structure in the interstellar medium of the Galaxy on a scale smaller than the grid of 21-cm observations.

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