Model equation of state to investigate the structure and evolution of superdense stars with a phase transition

Yudin, A. V.; Razinkova, T. L.; Nadyozhin, D. K.

doi:10.1134/s1063773713030079

Cited by 12 publications

(15 citation statements)

References 25 publications

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“…[115], L. Satarov, private communication (2010) based on calculations via EOS model described in [116], J. Randrup, presentations at several conferences 10 and Ref. [117], or [118]) but is not well-recognized yet. Further investigation and analysis of this fundamental difference between LGPT and QHPT is in preparation [119].…”

Section: B Deconfinement Phase Transitionmentioning

confidence: 99%

Noncongruence of the nuclear liquid-gas and deconfinement phase transitions

et al. 2013

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First order phase transitions (PTs) with more than one globally conserved charge, so-called noncongruent PTs, have characteristic differences compared to congruent PTs (e.g., dimensionality of phase diagrams, location and properties of critical points and endpoints). In the present article we investigate the non-congruence of the nuclear liquid-gas PT at sub-saturation densities and the deconfinement PT at high densities and/or temperatures in Coulomb-less models, relevant for heavyion collisions and neutron stars. For the first PT, we use the FSUgold relativistic mean-field model and for the second one the relativistic chiral SU(3) model. The chiral SU(3) model is one of the few models for the deconfinement PT, which contains quarks and hadrons in arbitrary proportions (i.e. a "solution") and gives a continuous transition from pure hadronic to pure quark matter above a critical point. The study shows the universality of the applied concept of non-congruence for the two PTs with an upper critical point, and illustrates the different typical scales involved. In addition, we find a principle difference between the liquid-gas and the deconfinement PTs: in contrast to the ordinary Van-der-Waals-like PT, the phase coexistence line of the deconfinement PT has a negative slope in the pressure-temperature plane. As another qualitative difference we find that the non-congruent features of the deconfinement PT become vanishingly small around the critical point.

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Section: B Deconfinement Phase Transitionmentioning

confidence: 99%

Noncongruence of the nuclear liquid-gas and deconfinement phase transitions

et al. 2013

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“…The properties of hybrid stars are of great importance for explaining the supernova explosionmechanism in the simplest case where there are no magnetic field and rotation. This is because the phase transition to quark matter that arises at the boundary between the core of a hybrid star and its crust can be responsible for the development of hydrodynamic instability ending with a supernova explosion (see Yudin et al (2013) and references therein).…”

Section: Introductionmentioning

confidence: 99%

Special point on the mass-radius diagram of hybrid stars

et al. 2014

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“…This unusual decrease of temperature due to the phase transition has also been found for various hybrid EOS in other works, see, e.g., Refs. [3,15,27,[34][35][36], but without discussing any further implications for compact stars. This special thermal property can also be present without a first-order phase transition; for example, in Ref.…”

Section: Unusual Thermal Properties Of the Eos Induced By The Phamentioning

confidence: 99%

“…The reason for this special property of the QCD phase transition can be identified by using the ClausiusClapeyron equation [27,32,33,40,43],…”

Section: Relation To the Qcd Phase Diagrammentioning

confidence: 99%

Hot third family of compact stars and the possibility of core-collapse supernova explosions

et al. 2016

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A phase transition to quark matter can lead to interesting phenomenological consequences in corecollapse supernovae, e.g., triggering an explosion in spherically symmetric models. However, until now, this explosion mechanism was only shown to be working for equations of state that are in contradiction with recent pulsar mass measurements. Here, we identify that this explosion mechanism is related to the existence of a third family of compact stars. For the equations of state investigated, the third family is only pronounced in the hot, early stages of the protocompact star and absent or negligibly small at zero temperature and thus represents a novel kind of third family. This interesting behavior is a result of unusual thermal properties induced by the phase transition, e.g., characterized by a decrease of temperature with increasing density for isentropes, and can be related to a negative slope of the phase transition line in the temperature-pressure phase diagram.

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Model equation of state to investigate the structure and evolution of superdense stars with a phase transition

Cited by 12 publications

References 25 publications

Noncongruence of the nuclear liquid-gas and deconfinement phase transitions

Noncongruence of the nuclear liquid-gas and deconfinement phase transitions

Special point on the mass-radius diagram of hybrid stars

Hot third family of compact stars and the possibility of core-collapse supernova explosions

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