The mass effect of the quark phase transition in supernova core

Xiang-Jun, Lai; Liu, Men-Quan; Liu, Jingjing; Zhi-Quan, Luo

doi:10.1088/1674-1056/17/2/038

Cited by 4 publications

(3 citation statements)

References 26 publications

(32 reference statements)

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“…These reaction rates have already been calculated in the literature (see e.g. [33,[35][36][37][38][39][40]) but we have introduced some improvements here. For example, in Refs.…”

Section: Discussionmentioning

confidence: 99%

Electroweak decay of quark matter within combustion flames at compact objects

Rosero

Lugones

2015

Nuclear and Particle Physics Proceedings

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We study the weak interaction processes taking place within a combustion flame that converts dense hadronic matter into quark matter in a compact star. Using the Boltzmann equation we follow the evolution of a small element of just deconfined quark matter all along the flame interior until it reaches chemical equilibrium at the back boundary of the flame. We obtain the reaction rates and neutrino emissivities of all the relevant weak interaction processes without making any assumption about the neutrino degeneracy. We analyse systematically the role the initial conditions of unburnt hadronic matter, such as density, temperature, neutrino trapping and composition, focusing on typical astrophysical scenarios such as cold neutron stars, protoneutron stars, and post merger compact objects. We find that the temperature within the flame rises significantly in a timescale of 1 nanosecond. The increase in T strongly depends on the initial strangeness of hadronic matter and tends to be more drastic at larger densities. Typical final values range between 20 and 60 MeV. The nonleptonic process u + d → u + s is always dominant in cold stars, but in hot object the process u + e − ↔ d + νe becomes relevant, and in some cases dominant, near chemical equilibrium. The rates for the other processes are orders of magnitude smaller. We find that the neutrino emissivity per baryon is very large, leading to a total energy release per baryon of 2 − 64 MeV in the form of neutrinos along the flame. We discuss some astrophysical consequences of the results.

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“…These reaction rates have already been calculated in the literature (see e.g. [33,[35][36][37][38][39][40]) but we have introduced some improvements here. For example, in Refs.…”

Section: Discussionmentioning

confidence: 99%

Electroweak decay of quark matter within combustion flames at compact objects

Rosero

Lugones

2015

Nuclear and Particle Physics Proceedings

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“…In this experiment, the mercury as the working medium. According to the set of operating parameters, measuring the shape of different structures of the static pressure groove and the magnetic flux density and current relationship (equivalently, difference of level of mercury) [4] .…”

Section: Simulation Experiments Methodsmentioning

confidence: 99%

Study on Relationship between the Groove Structure and Efficiency of Electromagnetic Pump Used in Aluminum Alloy Casting

Hou

Liu

Peng

et al. 2011

AMR

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The relationship between the groove structure of the direct current plane electromagnetic pump and efficiency has been investigated in this paper. Methods By using mercury as working medium, experiments have been conducted through simulation of direct current plane electromagnetic pump. The comparision of efficiencies is obtained by measuring the values of hydrostatic head of various groove structures under the fixed working parameters are measured. The groove structure of the electromagnetic pump has a great influence on its hydrostatic head and its relative efficiency. Several important ways can be used to improve the efficiency of the electromagnetic pump including restraining the overflow of working current, optimizing the direction of the electrolines, reducing the inner surface area of the groove and increasing the entrance force.

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“…After some time (typically τ weak ∼ 10 −8 s), weak interactions drive it to a β-stable configuration. During the process of β-equilibration, there is an energy release that rises the temperature of quark matter to ∼ 40 MeV [43][44][45][46][47][48]. An inclusion of these weak decay processes in the hydrodynamic simulation is out of the scope of the present work since it involves the solution of the Boltzmann equation with the appropriate decay rates for all the fluid elements within the flame.…”

Section: The Mit Bag Modelmentioning

confidence: 99%

Hydrodynamic Simulations of the Combustion of Dense Hadronic Matter into Quark Matter

Manrique

Lugones

2015

Braz J Phys

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We perform special-relativistic one-dimensional hydrodynamic simulations to study the combustion of hadronic matter into quark matter in neutron star conditions. For the equation of state, we use a relativistic mean-field Walecka model for hadronic matter and the MIT bag model for quark matter. We study the growth of a small core of quark matter surrounded by hadronic matter at constant density, where both regions are initially at rest. We show that a strong detonation front propagates into hadronic matter converting it into quark matter. We find that the timescale for the conversion of a compact star is around tens of microseconds.

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The mass effect of the quark phase transition in supernova core

Cited by 4 publications

References 26 publications

Electroweak decay of quark matter within combustion flames at compact objects

Electroweak decay of quark matter within combustion flames at compact objects

Study on Relationship between the Groove Structure and Efficiency of Electromagnetic Pump Used in Aluminum Alloy Casting

Hydrodynamic Simulations of the Combustion of Dense Hadronic Matter into Quark Matter

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