The central density cusp of the Sagittarius dwarf spheroidal galaxy

Abstract

We present an analysis of the density profile in the central region of the Sagittarius dwarf spheroidal galaxy. A strong density enhancement of Sgr stars is observed. The position of the peak of the detected cusp is indistinguishable from the center of M54. The photometric properties of the cusp are fully compatible with those observed in the nuclei of dwarf elliptical galaxies, indicating that the Sgr dSph would appear as a nucleated galaxy independently of the presence of M54 at its center.

7 pages, 9 figures. Accepted for publication in MNRAS

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• Detecting Axion Dark Matter with Radio Lines from Neutron Star Populations
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• The Northern wraps of the Sagittarius Stream as traced by Red Clump stars: distances, intrinsic widths and stellar densities
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• A Deep View into the Nucleus of the Sagittarius Dwarf Spheroidal Galaxy with MUSE. III. Discrete multi-component population-dynamical models based on the Jeans equations
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• Extra-tidal star candidates in globular clusters of the Sagittarius dwarf spheroidal galaxy
• Solar System formation
• Many new variable stars discovered in the core of the globular cluster NGC 6715 (M54) with EMCCD observations
• An Alternative Interpretation for the Moduli Fields of the Cosmology Associated to Type IIB Supergravity with Fluxes
• Nuclear star clusters as probes of dark matter halos: the case of the Sagittarius Dwarf Spheroidal Galaxy
• Globular cluster candidates in the Sagittarius dwarf galaxy