Role of the neutral X-fermion in describing the dark matter of the universe

Abstract Decades of progress culminating in the optical interferometry developed in the Keck Observatory and VLT GRAVITY facility led to the determination of the mass of the compact object in Sgr A* in $$4.3\times 10^6 \,M_{\odot }$$ 4.3 × 10 6 M ⊙ and firm limits on its angular momentum. The most s...

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Bibliographic Details
Main Authors: Remo Ruffini, Gregory Vereshchagin
Format: Article
Language:English
Published: SpringerOpen 2025-07-01
Series:European Physical Journal C: Particles and Fields
Online Access:https://doi.org/10.1140/epjc/s10052-025-14404-6
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