NASA NTRS · 19820049956
X-ray observations and the cosmic distance scale
Abstract
The physics of hot gas in the cores of distant clusters of galaxies can be studied in considerable detail through a specific combination of X-ray, microwave and optical observations. In principle, the X-ray luminosity of the gas can be calculated from these data, providing a measure of the cluster distance. These ideas and their application to Abell 2218, the only cluster for which even marginally suitable data yet exist are examined.
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Boynton, P. E.. 1981-01-01. X-ray observations and the cosmic distance scale. https://ntrs.nasa.gov/citations/19820049956
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