Clusters of galaxies in a Weyl geometric approach to gravity

Abstract

A model for the dark halos of galaxy clusters, based on the Weyl geometric scalar tensor theory of gravity (WST) with a MOND-like approximation, is proposed. It is uniquely determined by the baryonic mass distribution of hot gas and stars. A first heuristic check against empirical data for 19 clusters (2 of which are outliers), taken from the literature, shows encouraging results. Modulo a caveat resulting from different background theories (Einstein gravity plus $\Lambda CDM$ versus WST), the total mass for 15 of the outlier reduced ensemble of 17 clusters seems to be predicted correctly (in the sense of overlapping $1\sigma$ error intervals).

Version 5 is a corrected, and in some minor aspects improved, postprint of the paper of published in Journal of Gravity (JG) volume 2016, article ID 9706704. The most important corrections refer to equs. (28) and (47) of the publication in JG. A new run of the data evaluation becomes necessary. The results are given here

References in corpus (3)

• On the efficiency and reliability of cluster mass estimates based on member galaxies
• Weyl gauge-vector and complex dilaton scalar for conformal symmetry and its breaking
• MOND-like acceleration in integrable Weyl geometric gravity

Cited by in corpus (2)

• A scalar field inducing a non-metrical contribution to gravitational acceleration and a compatible add-on to light deflection
• The unexpected resurgence of Weyl geometry in late 20-th century physics