Rapidly spinning massive pulsars as an indicator of quark deconfinement
Rapidly spinning massive pulsars as an indicator of quark deconfinement
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.
nucl-th, astro-ph.HE, hep-ph
Gärtlein, Christoph
e88bb609-1e91-415c-b4b5-084826d5654a
Sagun, Violetta
a3bf27d9-2d6f-41e6-85b2-8f69cd24c3a2
Ivanytskyi, Oleksii
f34f3712-87ba-4472-afac-e1a784cbeb1f
Blaschke, David
fcf4c156-dbbd-43fc-9346-4c15860dc7f9
Lopes, Ilídio
fa70ffe5-6208-4b92-8057-d0564d2eb985
19 January 2026
Gärtlein, Christoph
e88bb609-1e91-415c-b4b5-084826d5654a
Sagun, Violetta
a3bf27d9-2d6f-41e6-85b2-8f69cd24c3a2
Ivanytskyi, Oleksii
f34f3712-87ba-4472-afac-e1a784cbeb1f
Blaschke, David
fcf4c156-dbbd-43fc-9346-4c15860dc7f9
Lopes, Ilídio
fa70ffe5-6208-4b92-8057-d0564d2eb985
Gärtlein, Christoph, Sagun, Violetta, Ivanytskyi, Oleksii, Blaschke, David and Lopes, Ilídio
(2026)
Rapidly spinning massive pulsars as an indicator of quark deconfinement.
Journal of Subatomic Particles and Cosmology, 5, [100286].
(doi:10.1016/j.jspc.2026.100286).
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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2512.07977v1
- Author's Original
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1-s2.0-S3050480526000026-main
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e-pub ahead of print date: 11 January 2026
Published date: 19 January 2026
Additional Information:
Proceedings of XQCD 2025
Keywords:
nucl-th, astro-ph.HE, hep-ph
Identifiers
Local EPrints ID: 510939
URI: http://eprints.soton.ac.uk/id/eprint/510939
ISSN: 3050-4805
PURE UUID: 12af525e-d91c-4399-9f8f-86f801520123
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Date deposited: 27 Apr 2026 16:46
Last modified: 28 Apr 2026 02:23
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Contributors
Author:
Christoph Gärtlein
Author:
Violetta Sagun
Author:
Oleksii Ivanytskyi
Author:
David Blaschke
Author:
Ilídio Lopes
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