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Stellar stability in the presence of reacting interfaces: consequences for hybrid stars

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Author(s):
Lugones, German ; Ouyed, R ; Leahy, D ; Koning, N ; Fischer, T ; Kohsuke, S ; Mannarelli, M ; Weber, F
Total Authors: 8
Document type: Journal article
Source: Journal of Physics: Conference Series; v. 2536, p. 8-pg., 2023-01-01.
Abstract

If the surface tension of dense matter is high enough, a hybrid star composed of a quark matter core and a hadronic mantle may display a sharp interface. Perturbations of such a star may lead to conversion reactions occurring in the vicinity of the quark-hadron splitting surface. If the conversion timescale is much larger than the perturbation one (slow reactions), changes of stellar stability do occur at critical points of the M(R) curve. As a consequence, a new class of dynamically stable hybrid stars is possible. Densities tens of times larger than the nuclear saturation density could be attained at the center of these hypothetic objects. We examine possible formation mechanisms for this new class of hybrid configurations and explore potential observational signatures that could serve as evidence for their existence. (AU)

FAPESP's process: 22/02341-9 - Equation of state of matter under extreme conditions: models and applications
Grantee:Germán Lugones
Support Opportunities: Regular Research Grants
FAPESP's process: 13/10559-5 - Investigation of high energy and plasma astrophysics phenomena: theory, numerical simulations, observations, and instrument development for the Cherenkov Telescope Array (CTA)
Grantee:Elisabete Maria de Gouveia Dal Pino
Support Opportunities: Special Projects