Work

Dark Halos, Intermediate-Mass BH and Nuclear Stellar Clusters in Dwarf Spheroidals

Year: 2026

Type: article

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.

Source: Universe

DOI: 10.3390/universe12070195

Authors: Rojin Bayati, Paolo Salucci

Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Genova, University of Genoa, Scuola Internazionale Superiore di Studi Avanzati

Language: English

Topic: Galaxies: Formation, Evolution, Phenomena

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,930

OpenAlex ID: W7166581230

FWCI:

Cites: 46

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