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Imprint of the galactic acceleration scale on globular cluster systems

Bílek, M. ; Samurović, S. and Renaud, F. LU (2019) In Astronomy and Astrophysics 629.
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.

Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Galaxies: elliptical and lenticular, cD, Galaxies: formation, Galaxies: halos, Galaxies: structure, Gravitation
in
Astronomy and Astrophysics
volume
629
article number
L5
publisher
EDP Sciences
external identifiers
  • scopus:85071655278
ISSN
0004-6361
DOI
10.1051/0004-6361/201936158
language
English
LU publication?
yes
id
fe185f9d-3ba3-446a-9000-7b7bdb1cd82d
date added to LUP
2019-09-17 12:50:23
date last changed
2024-04-02 16:27:21
@article{fe185f9d-3ba3-446a-9000-7b7bdb1cd82d,
  abstract     = {{<p>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 a<sub>0</sub> 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.</p>}},
  author       = {{Bílek, M. and Samurović, S. and Renaud, F.}},
  issn         = {{0004-6361}},
  keywords     = {{Galaxies: elliptical and lenticular, cD; Galaxies: formation; Galaxies: halos; Galaxies: structure; Gravitation}},
  language     = {{eng}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{Imprint of the galactic acceleration scale on globular cluster systems}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201936158}},
  doi          = {{10.1051/0004-6361/201936158}},
  volume       = {{629}},
  year         = {{2019}},
}