Analytic radial acceleration relation for galaxy clusters

Man Ho CHAN, Ka Chung LAW

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4 Citations (Scopus)


Recently, a tight correlation between the dynamical radial acceleration and the baryonic radial acceleration in galaxies - the radial acceleration relation - has been discovered. This has been claimed as an indirect support of the modified gravity theories. However, whether the radial acceleration relation could also be found in galaxy clusters is controversial. In this article, we derive and present an analytic radial acceleration relation for the central region of galaxy clusters. We examine the data of some large galaxy clusters and we find that the resulting radial acceleration relation has a very large scatter. Moreover, although the radial acceleration relation for galaxy clusters shows some agreement with the one discovered in galaxies for a certain range of baryonic radial acceleration, their functional forms are somewhat different from each other. This suggests that the radial acceleration relation may not be a universal relation in general. Copyright © 2022 American Physical Society.

Original languageEnglish
Article number083003
JournalPhysical Review D
Issue number8
Publication statusPublished - Apr 2022


Chan, M. H., & Law, K. C. (2022). Analytic radial acceleration relation for galaxy clusters. Physical Review D, 105(8). Retrieved from


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