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Astronomy and AstrophysicsVolume 629, 1 September 2019, Article number L5

Imprint of the galactic acceleration scale on globular cluster systems(Article)(Open Access)

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  • aUniversité de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg (ObAS), Strasbourg, 67000, France
  • bAstronomical Observatory, Volgina 7, Belgrade, 11060, Serbia
  • cLund Observatory, Sölvegatan 27 Box 43, Lund, 221 00, Sweden

Abstract

We report that the density profiles of globular cluster (GC) systems in a sample of 17 early-Type galaxies (ETGs) show breaks at the radii where the gravitational acceleration exerted by the stars equals the galactic acceleration scale a0 known from the radial acceleration relation or the modified Newtonian dynamics (MOND). The match with the other characteristic radii in the galaxy is not that close. We propose possible explanations in the frameworks of the Lambda cold dark matter (ΛCDM) model and MOND. We find tentative evidence that in the ΛCDM context, GCs reveal not only the masses of the dark halos through the richness of the GC systems but also the concentrations through the break radii of the GC systems. © M. Bílek et al. 2019.

Author keywords

Galaxies: elliptical and lenticular, cDGalaxies: formationGalaxies: halosGalaxies: structureGravitation

Indexed keywords

Engineering controlled terms:AstronomyAstrophysicsGravitation
Engineering uncontrolled termsGalaxies: elliptical and lenticular , CDGalaxies: formationGalaxies: halosGalaxies: structureGlobular clustersGravitational accelerationsNewtonian dynamicsRadial acceleration
Engineering main heading:Galaxies

Funding details

Funding sponsor Funding number Acronym
Knut och Alice Wallenbergs Stiftelse
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja176021MPNTR

  • 1

    Acknowledgements. We acknowledge Duncan Forbes for the suggestion that the breaks in the profiles of GC systems reflect the blue and red GC subpopulations. We thank Xavier Hernandez for an insightful referee report. SS acknowledges the support from the Ministry of Education, Science and Technological Development of the Republic of Serbia through project no. 176021 “Visible and Invisible Matter in Nearby Galaxies: Theory and Observations.” FR acknowledges support from the Knut and Alice Wallenberg Foundation.

  • ISSN: 00046361
  • CODEN: AAEJA
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1051/0004-6361/201936158
  • Document Type: Article
  • Publisher: EDP Sciences

  Bílek, M.; Université de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg (ObAS), Strasbourg, France;
© Copyright 2019 Elsevier B.V., All rights reserved.

Cited by 5 documents

Bílek, M. , Combes, F. , Nagesh, S.T.
Globular cluster orbital decay in dwarf galaxies with MOND and CDM: Impact of supernova feedback
(2024) Astronomy and Astrophysics
Bílek, M. , Hilker, M. , Renaud, F.
The galactic acceleration scale is imprinted on globular cluster systems of early-type galaxies of most masses and on red and blue globular cluster subpopulations
(2024) Astronomy and Astrophysics
Brouwer, M.M. , Oman, K.A. , Valentijn, E.A.
The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000
(2021) Astronomy and Astrophysics
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