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arXiv:1609.05917astro-ph.GA

The Radial Acceleration Relation in Rotationally Supported Galaxies

Stacy McGaugh, Federico Lelli, Jim Schombert

Abstract

We report a correlation between the radial acceleration traced by rotation curves and that predicted by the observed distribution of baryons. The same relation is followed by 2693 points in 153 galaxies with very different morphologies, masses, sizes, and gas fractions. The correlation persists even when dark matter dominates. Consequently, the dark matter contribution is fully specified by that of the baryons. The observed scatter is small and largely dominated by observational uncertainties. This radial acceleration relation is tantamount to a natural law for rotating galaxies.

arXiv comments
6 pages, 3 figures. Accepted for publication in Physical Review Letters
Journal reference
Phys. Rev. Lett. 117, 201101 (2016)
DOI
doi:10.1103/PhysRevLett.117.201101
Subjects
astro-ph.GAAstrophysics of Galaxies

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Linked by 3 identifiable commenters in 3 comments across 3 threads, from Sep 2016 to Nov 2016. Found in 1 HN submission from Sep 2018 to Sep 2018. Open submission discussions.

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Discussed in comments3 threads

  1. The Case Against Dark Matter 1 comment

    • I'm gonna pull my hair out. I saw this: >> The researchers analyzed a diverse set of 153 galaxies, and for each one they compared the rotation speed of visible matter at any given distance from the galaxy’s center with the amount of visible matter contained within that galactic…

      phkahlerView on HNParent context

  2. A Natural Law for Rotating Galaxies: What Does This Mean for Dark Matter? 1 comment
  3. Dark matter in galaxies is distributed exactly the same as matter is 1 comment

    • Paper: https://arxiv.org/pdf/1609.05917.pdf One of the possible conclusions: "Thirdly, the one-to-one correspondence between gbar and gobs suggests that the baryons are the source of the gravitational potential. In this case, one might alter the laws of dynamics rather than…

      scotty79View on HNParent context

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