Article Dans Une Revue Physical Review Research Année : 2026

Stellar properties indicating the presence of hyperons in neutron stars

Résumé

We describe distinctive stellar features indicating the presence of hyperons in neutron stars. A strongly negative curvature of the mass-radius relation R(M) is characteristic of hyperons, which can be determined from measurements of neutron stars with three different masses. Similarly, a reduced second derivative of the tidal deformability as function of mass $λ(M)$ points to hyperonic degrees of freedom in NS matter. The slopes of such curves R(M) and λ(M) can distinguish a hyperonic equation of state from purely nucleonic models if they appear increased (decreased for λ(M)) relative to the maximum mass of neutron stars.

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hal-05191608 , version 1 (18-03-2026)

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Andreas Bauswein, Aristeidis Nikolaidis, Georgios Lioutas, Hristijan Kochankovski, Prasanta Char, et al.. Stellar properties indicating the presence of hyperons in neutron stars. Physical Review Research, 2026, 8 (1), pp.013253. ⟨10.1103/ygtr-ktqk⟩. ⟨hal-05191608⟩
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