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X-radiation from clusters of galaxies: Spectral evidence for a hot evolved gasOSO-8 observations of the X-ray flux in the range 2-60 keV from the Virgo, Perseus, and Coma Clusters provide strong evidence for the thermal origin of the radiation, including iron line emission. The data are adequately described by emission from an isothermal plasma with an iron abundance in near agreement with cosmic levels. A power law description is generally less acceptable and is ruled out in the case of Perseus. Implications on the origin of the cluster gas are discussed.
Document ID
19760025007
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Serlemitsos, P. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smith, B. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holt, S. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Swank, J. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1976
Subject Category
Space Radiation
Report/Patent Number
X-611-76-205
NASA-TM-X-71189
Accession Number
76N32095
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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