A Hypothesis to Explain the Virial Discrepancy in Clusters of Galaxies

Details A Hypothesis to Explain the Virial Discrepancy in Clusters of Galaxies A Hypothesis to Explain the Virial Discrepancy in Clusters of Galaxies

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..46..335w&link_type=abstract

Astrophysics and Space Science, Volume 46, Issue 2, pp.335-339

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

On the basis of numerical experiments onn-body binding energies we tentatively consider the following hypothesis: If the distance between two galaxies forming a binary system isa g, and a cluster of galaxies that is substructured in a hierarchical fashion onall scales froma g upwards has a total massM, then the total gravitational binding energy of the cluster isΩ TH = -GM 2/2a g . As an explanation for ‘missing’ masses up to order 100 we test this hypothesis in three different ways, finding remarkable agreement with observation, with no need for physical missing mass.

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