Narrowing the allowed mass range of ultralight bosons with the S2 star

Abstract

It is well known that N-body simulations of ultralight bosons show the formation of a solitonic dark matter core in the innermost part of the halo. The scale length of such a soliton depends on the inverse of the mass of the boson. On the other hand, the orbital motion of stars in the Galactic Center depends on the distribution of matter whether be it baryonic or dark, providing an excellent probe for the gravitational field of the region. In this Letter we propose the S-stars in the Galactic Center as a new observational tool, complementary to other astrophysical systems, to narrow down the range of allowed values for an ultralight dark matter candidate boson mass. We built mock catalogs mirroring the forthcoming astrometric and spectroscopic observations of S2, and we used a MCMC analysis to predict the accuracy down to which the mass of an ultralight boson may be bounded, and we showed that, once complementary constraints are considered, this analysis will help to restrict the allowed range of the boson mass. Our analysis forecasts the bound on the mass of an ultralight boson to be $<10^{-19}$ eV at the 95% of confidence level.

5 pages, 2 figures, 1 table, 5 appendices. Accepted for publication in A&A Letters. Publication title changed with respect to previous versions during the editorial process

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Cited by in corpus (9)

• Bounding the mass of ultralight bosonic Dark Matter particles with the motion of the S2 star around Sgr A*
• The Galactic Center as a laboratory for theories of gravity and dark matter
• Confronting fuzzy dark matter with the rotation curves of nearby dwarf irregular galaxies
• Constraints on metric-affine gravity black holes from the stellar motion at the Galactic Center
• Kerr-scalaron metric and astronomical consequences near the Galactic Center black hole
• Dark Matter reconstruction from stellar orbits in the Galactic Centre
• PyGRO: a Python Integrator for General Relativistic Orbits
• Unveiling Orbital Chaos: The Wild Heart of Fuzzy Dark Matter Structures
• Constraining Axion Dark Matter with Galactic-Centre Resonant Dynamics