X-ray clusters of galaxies - Correlation of X-ray luminosity with galactic content

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cosmic Gases, Galactic Clusters, Intergalactic Media, Spiral Galaxies, X Ray Sources, Ariel 5 Satellite, Galactic Structure, Luminosity

Scientific paper

All 14 X-ray clusters of galaxies detected by the Ariel 5 satellite at high galactic latitudes with redshifts of less than 0.05 are analyzed optically for galaxy content. A strong correlation is found between cluster X-ray luminosity and galaxy type: the fraction of spiral galaxies in a cluster decreases rapidly with increasing X-ray luminosity. The observed correlation is consistent with a combined model of thermal bremsstrahlung emission from a hot intracluster gas and stripping of the spiral galaxies caused by the ram pressure of the same intracluster gas.

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