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Nuclear matter
About: Nuclear matter is a research topic. Over the lifetime, 10180 publications have been published within this topic receiving 248261 citations.
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TL;DR: In this paper, the Hartree-Fock approximation of the equation of state for hot dense matter occurring in stellar collapse is calculated at finite temperature using a modified Skyrme force which gives a rather good value of the compression modulus in nuclear matter.
121 citations
TL;DR: In this article, a two-stage model, consisting of a quick explosion and a slower evaporation, was presented to disassemble a piece of hot nuclear matter created in medium-energy nuclear collisions.
121 citations
TL;DR: In this paper, the authors studied the gravitational wave signal from eight 3D core-collapse supernova simulations and showed that the signal is dominated by $f$-and $g$-mode oscillations of the protoneutron star and its frequency evolution encodes the contraction rate of the latter, which, in turn, is known to depend on the star's mass, on the equation of state, and on transport properties in warm nuclear matter.
Abstract: We study the gravitational wave signal from eight new 3D core-collapse supernova simulations. We show that the signal is dominated by $f$- and $g$-mode oscillations of the protoneutron star and its frequency evolution encodes the contraction rate of the latter, which, in turn, is known to depend on the star's mass, on the equation of state, and on transport properties in warm nuclear matter. A lower-frequency component of the signal, associated with the standing accretion shock instability, is found in only one of our models. Finally, we show that the energy radiated in gravitational waves is proportional to the amount of turbulent energy accreted by the protoneutron star.
121 citations
TL;DR: In this paper, the authors present a simple equation of state that yields, in the non-rotating case, maximally compact models of neutron stars, and argue that stars constructed in this way will also be stable when rotating with periods < 0.5 ms.
Abstract: IF the submillisecond pulsar in the remnant of supernova 1987A really is rotating stably with a period Psmp of 0.508 ms (ref. 1), its existence can be used to rule out nearly all 'realistic' equations of state for dense nuclear matter. (An alternative hypothesis, that the pulsar is vibrating rather than rotating2, yields no such constraints.) We present here a simple equation of state that yields, in the non-rotating case, maximally compact models of neutron stars, and argue that stars constructed in this way will also be stable when rotating with periods <0.5 ms. Additional constraints found by applying the same equation of state to the 'slowly' rotating pulsar PSR1913 + 16, whose mass is accurately known, leaves only a small range of acceptable parameters for neutron star models based on equations of state that obey the causality requirement that their sound speeds are less than the speed of light.
121 citations
TL;DR: In this article, the quark-meson coupling model was extended to investigate the change of hadron properties in finite nuclei, and a simple scaling relation for the changes of the hadron masses was found, which can be described in terms of the number of nonstrange quarks in a hadron and the value of the scalar mean field in a nucleus.
Abstract: The quark-meson coupling model, based on a mean-field description of nonoverlapping nucleon bags bound by the self-consistent exchange of $\ensuremath{\sigma}$, $\ensuremath{\omega}$, and $\ensuremath{\rho}$ mesons, is extended to investigate the change of hadron properties in finite nuclei. Relativistic Hartree equations for spherical nuclei have been derived from a relativistic quark model of the structure of bound nucleons and mesons. Using this unified, self-consistent description of both infinite nuclear matter and finite nuclei, we investigate the properties of some closed-shell nuclei and study the changes in the hadron masses of the nonstrange vector mesons, the hyperons, and the nucleon in those nuclei. We find a new, simple scaling relation for the changes of the hadron masses, which can be described in terms of the number of nonstrange quarks in the hadron and the value of the scalar mean field in a nucleus.
119 citations