There is no universal acceleration scale in galaxies

Man Ho CHAN, Shantanu DESAI, Antonino DEL POPOLO

Research output: Contribution to journalArticlespeer-review

Abstract

Recently, many studies have seemed to reveal the existence of some correlations between dark matter and baryonic matter. In particular, the unexpected tight radial acceleration relation (RAR) discovered in rotating galaxies has drawn a lot of attention. The RAR suggests the existence of a universal and fundamental acceleration scale in galaxies, which seems to challenge the ΛCDM model and favor some modified gravity theories. A large debate about whether RAR is compatible with the ΛCDM model has arisen. Here, by analyzing the high-quality velocity dispersion profiles of 13 E0-type elliptical galaxies in the SDSS-IV MaNGA sample and assuming a power-law function of radius r for the 3D velocity dispersion in each galaxy, we report the RAR for E0-type elliptical galaxies and we show that the resultant RAR has more than 5σ deviations from the RAR in late-type galaxies. This new RAR provides an independent probe to falsify the existence of any universal acceleration scale in galaxies. Our result significantly challenges those modified gravity theories that suggest the existence of any universal acceleration scale. Copyright © 2023 Astronomical Society of Japan.
Original languageEnglish
Pages (from-to)1441-1452
JournalPublications of the Astronomical Society of Japan
Volume74
Issue number6
Early online date25 Oct 2022
DOIs
Publication statusPublished - Dec 2022

Citation

Chan, M. H., Desai, S., & Del Popolo, A. (2022). There is no universal acceleration scale in galaxies. Publications of the Astronomical Society of Japan, 74(6), 1441-1452. doi: 10.1093/pasj/psac083

Keywords

  • Dark matter
  • Galaxies

Fingerprint

Dive into the research topics of 'There is no universal acceleration scale in galaxies'. Together they form a unique fingerprint.