Imprint of the galactic acceleration scale on globular cluster systems

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Imprint of the galactic acceleration scale on globular cluster systems. / Bílek, M.; Samurović, S.; Renaud, F.

I: Astronomy and Astrophysics, Vol. 629, L5, 2019.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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TY - JOUR

T1 - Imprint of the galactic acceleration scale on globular cluster systems

AU - Bílek, M.

AU - Samurović, S.

AU - Renaud, F.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Galaxies: elliptical and lenticular, cD

KW - Galaxies: formation

KW - Galaxies: halos

KW - Galaxies: structure

KW - Gravitation

U2 - 10.1051/0004-6361/201936158

DO - 10.1051/0004-6361/201936158

M3 - Article

VL - 629

JO - Astronomy & Astrophysics

T2 - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 1432-0746

M1 - L5

ER -