PreprintCC BY 4.0arXiv
Dark Halos, Intermediate-Mass BH and Nuclear Stellar Clusters in Dwarf Spheroidals
Abstract
We exploit the halo densities of three dwarf spheroidals recently obtained to investigate their dark matter distribution. We address the well-known DM halo core-cusp issue by finding that the NFW ΛCDM halo profile is in strong disagreement with these inferred halo densities, which instead result very well-reproduced by the Burkert halo cored profile with the central density ρ0 and the core radius r0. These structural parameters result connected among themselves and with the length scale of the stellar matter component in a way similar to that present in disk systems. By analyzing the properties of dark halo densities in their innermost regions, we find no trace of a central intermediate-mass black hole or of a nuclear stellar cluster.
Versions
Related
- A Cosmological Framework for Stellar Collisions at High Redshift in Proto-globular Clusters, Nuclear Star Clusters, and Little Red Dots
- Wandering intermediate-mass black holes and off-nuclear tidal disruption events from early star clusters
- The STARfall pathway: forging intermediate-mass black holes through stellar collisions in dense star clusters
- Stellar discs and intermediate-mass black holes in galactic nuclei II. Fragmenting the disc and forming the S-stars in a live nuclear star cluster
- The coupled evolution of nuclear star clusters and intermediate-mass black holes in a dwarf-galaxy merger
BibTeX
@misc{bayati2026dark,
title = {{Dark Halos, Intermediate-Mass BH and Nuclear Stellar Clusters in Dwarf Spheroidals}},
author = {Rojin Bayati and Paolo Salucci},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.41522},
eprint = {2610.41522},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.41522},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Dark Halos, Intermediate-Mass BH and Nuclear Stellar Clusters in Dwarf Spheroidals
AU - Rojin Bayati
AU - Paolo Salucci
PY - 2026
DA - 2026/10/30
PB - arXiv
DO - 10.48550/arxiv.2610.41522
UR - https://arxiv.org/abs/2610.41522
AB - We exploit the halo densities of three dwarf spheroidals recently obtained to investigate their dark matter distribution. We address the well-known DM halo core-cusp issue by finding that the NFW ΛCDM halo profile is in strong disagreement with these inferred halo densities, which instead result very well-reproduced by the Burkert halo cored profile with the central density ρ_0 and the core radius r_0. These structural parameters result connected among themselves and with the length scale of the stellar matter component in a way similar to that present in disk systems. By analyzing the properties of dark halo densities in their innermost regions, we find no trace of a central intermediate-mass black hole or of a nuclear stellar cluster.
ER -