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arXiv · 2512.07977

Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement

Christoph Gärtlein·Violetta Sagun·Oleksii Ivanytskyi·David Blaschke·Ilídio Lopes
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Abstract

We study rotating hybrid stars, with particular emphasis on the effect of spin on the deconfinement phase transition and star properties. Our analysis is based on a hybrid equation of state with a phase transition from hadronic matter containing hyperons to color-superconducting quark matter, where the quark phase is modeled within a relativistic density functional approach. By varying the strength of the vector repulsion and diquark pairing couplings in the microscopic quark Lagrangian, we construct a set of hybrid star sequences with different quark-matter onset densities. This framework ensures consistency with astrophysical and gravitational wave constraints on mass, radius, and tidal deformability.

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Christoph Gärtlein, Violetta Sagun, Oleksii Ivanytskyi, David Blaschke, Ilídio Lopes. 2025-12-08. Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement. https://doi.org/10.1016/j.jspc.2026.100286

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