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Related papers: Triplet paring in neutron matter

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We study proximity effect of pair correlation in the inner crust of neutron stars by means of the Skyrme-Hartree-Fock-Bogoliubov theory formulated in the coordinate space. We describe a system composed of a nuclear cluster immersed in…

Nuclear Theory · Physics 2020-09-25 Toshiyuki Okihashi , Masayuki Matsuo

We investigate the cooling of neutron stars with relativistic and non-relativistic models of dense nuclear matter. We focus on the effects of uncertainties originated from the nuclear models, the composition of elements in the envelope…

Nuclear Theory · Physics 2017-02-21 Yeunhwan Lim , Chang Ho Hyun , Chang-Hwan Lee

Axial anomalous contributions into neutrino PBF losses due to triplet pairing of neutrons are still ignored in modeling the evolution of neutron stars. In this paper, the influence of the anomalous axial contributions onto the rate of…

Nuclear Theory · Physics 2017-12-29 Lev B Leinson

The interior of mature neutron stars is expected to contain superfluid neutrons and superconducting protons. The influence of temperature and currents on superfluid properties is studied within the self-consistent time-dependent nuclear…

Nuclear Theory · Physics 2026-05-21 Valentin Allard , Nicolas Chamel

The fundamental structure of the full set of solutions of the BCS $^3 P_2$ pairing problem in neutron matter is established. The relations between different spin-angle components in these solutions are shown to be practically independent of…

Nuclear Theory · Physics 2008-11-26 V. A. Khodel , V. V. Khodel , J. W. Clark

The interior of a neutron star is expected to be occupied by a neutron $^3P_2$ superfluid, which is the condensate of spin-triplet $p$-wave Cooper pairs of neutrons with total angular momentum $J=2$. Here we investigate the thermodynamic…

Nuclear Theory · Physics 2021-10-14 Takeshi Mizushima , Shigehiro Yasui , Daisuke Inotani , Muneto Nitta

The structure and density dependence of the pairing gap in infinite matter is relevant for astrophysical phenomena and provides a starting point for the discussion of pairing properties in nuclear structure. Short-range correlations can…

Nuclear Theory · Physics 2017-10-27 A. Rios , A. Polls , W. H. Dickhoff

The parity doublet model, containing the SU(2) multiplets including the baryons identified as the chiral partners of the nucleons is applied to neutron stars. The maximum mass for the star is calculated for different stages of the cooling…

Astrophysics · Physics 2008-01-17 V. Dexheimer , S. Schramm , H. Stoecker

I review some of the ideas that have been proposed for the structure of neutron star interiors, and concentrate on the theoretical arguments for the existence of superfluidity in neutron stars. I also discuss the implications of neutron…

High Energy Astrophysical Phenomena · Physics 2019-06-27 J. A. Sauls

We present results for the $^3P_2 - ^3F_2$ pairing gap in neutron matter with several realistic nucleon-nucleon potentials, in particular with recent, phase-shift equivalent potentials. We find that their predictions for the gap cannot be…

Nuclear Theory · Physics 2008-11-26 M. Baldo , O. Elgaroey , L. Engvik , M. Hjorth-Jensen , H. -J. Schulze

We investigate superfluid phase transitions of asymmetric nuclear matter at finite temperature ($T$) and density ($\rho$) with a low proton fraction ($Y_{\rm p} \le 0.2$) which is relevant to the inner crust and outer core of neutron stars.…

Nuclear Theory · Physics 2020-01-10 Hiroyuki Tajima , Tetsuo Hatsuda , Pieter van Wyk , Yoji Ohashi

Calculations are performed of the cooling of neutron stars with standard and enhanced neutrino energy losses in the presence of neutron and proton superfluidities in the stellar cores. The effects of superfluidity on the heat capacity and…

Astrophysics · Physics 2007-05-23 K. P. Levenfish , D. G. Yakovlev

We present solutions of the BCS gap equation in the channels ${}^1S_0$ and ${}^3P_2-{}^3F_2$ in neutron matter based on nuclear interactions derived within chiral effective field theory (EFT). Our studies are based on a representative set…

Nuclear Theory · Physics 2017-02-08 C. Drischler , T. Krüger , K. Hebeler , A. Schwenk

I review three problems in astrophysics of compacts stars: (i) the phase diagram of warm pair-correlated nuclear matter a sub-saturation densities at finite isospin asymmtery; (ii) the Standard Model neutrino emission from superfluid phases…

Nuclear Theory · Physics 2013-06-28 Armen Sedrakian

{We calculate the neutrino emissivity of superfluid neutron matter in the inner crust of neutron stars. We find that neutrino emission due to fluctuations resulting from the formation of Cooper pairs at finite temperature is highly…

Nuclear Theory · Physics 2009-01-21 Andrew W. Steiner , Sanjay Reddy

We consider models of cooling neutron stars with nucleon cores which possess moderately strong triplet-state superfluidity of neutrons. When the internal temperature drops below the maximum of the critical temperature over the core, $T_{\rm…

Solar and Stellar Astrophysics · Physics 2014-12-15 P. S. Shternin , D. G. Yakovlev

We examine the influence of the anisotropy of the superfluid energy gap and residual Fermi-liquid interactions in the triplet-correlated neutron liquid onto neutrino energy losses through neutral weak currents. The neutrino-pair emission…

Nuclear Theory · Physics 2013-02-12 L. B. Leinson

We apply an extended version of the SU(3) parity model, containing quark degrees of freedom, to study neutron stars. The model successfully reproduces the main thermodynamic features of QCD which allows us to describe the composition of…

High Energy Astrophysical Phenomena · Physics 2015-06-05 V. Dexheimer , J. Steinheimer , R. Negreiros , S. Schramm

In this review paper we discuss the effects of pairing correlations on inner crust matter in the density region where nuclear clusters are supposed to coexist with nonlocalised neutrons. The pairing correlations are treated in the framework…

Nuclear Theory · Physics 2012-01-16 Jérôme Margueron , N. Sandulescu

We analyse the effect of neutron superfluidity on the cooling time of inner crust matter in neutron stars, in the case of a rapid cooling of the core. The specific heat of the inner crust, which determines the thermal response of the crust,…

Nuclear Theory · Physics 2008-11-26 C. Monrozeau , J. Margueron , N. Sandulescu