☆ 4.4 Article

Delta-resonances and hyperons in proto-neutron stars and merger remnants

EUROPEAN PHYSICAL JOURNAL A (2022)

Related references

Note: Only part of the references are listed.

Article Astronomy & Astrophysics

Observing Supernova Neutrino Light Curves with Super-Kamiokande. II. Impact of the Nuclear Equation of State

Ken'ichiro Nakazato et al.

Summary: This study evaluates the late-time evolution of the neutrino event rate from supernovae using simulated results of proto-neutron star cooling. It extends previous research by examining the impact of the nuclear equation of state on the neutrino event rate. The study finds that both high-density and low-density EOS affect the neutrino event rate, with the former determining the radius of the proto-neutron star and the latter affecting its surface temperature. Based on the evaluation of the neutrino event rate, a new analysis method is proposed to extract the time variability of the neutrino average energy while accounting for statistical errors in observations.

ASTROPHYSICAL JOURNAL (2022)

Add to Collection

Article Astronomy & Astrophysics

Projecting the likely importance of weak-interaction-driven bulk viscosity in neutron star mergers

Elias R. Most et al.

Summary: The study shows that bulk viscosity driven by Urca processes can affect the gravitational wave signal of a neutron star coalescence, especially in the post-merger phase. It was found that bulk viscosity could potentially have significant effects on the global dynamics of the merger scenario.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Add to Collection

Article Astronomy & Astrophysics

Proto-neutron star evolution with improved charged-current neutrino-nucleon interactions

A. Pascal et al.

Summary: We simulate the Kelvin-Helmholtz cooling phase of proto-neutron stars using a new numerical code and the quasi-static approximation. By including charged-current neutrino-nucleon reactions and convective motions, we find that the inclusion of convective motion has the dominant effect on the cooling time-scale, neutrino signal, and composition of the neutrino-driven wind. The computation of nuclear correlations within the random phase approximation has a relatively small impact compared to the mean field approach.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Add to Collection

Article Astronomy & Astrophysics

Formulating bulk viscosity for neutron star simulations

T. Celora et al.

Summary: To extract precise physical information from neutron-star merger events, numerical simulations need to include as much relevant physics as possible. This paper focuses on the role of nuclear reactions and discusses theoretical descriptions of a reactive system using bulk viscosity, along with an analysis connecting to state-of-the-art simulations. The results demonstrate the importance of handling different assumptions/approximations to properly account for nuclear reactions in future simulations.

PHYSICAL REVIEW D (2022)

Add to Collection

Review Physics, Particles & Fields

Coalescence of black hole-neutron star binaries

Koutarou Kyutoku et al.

Summary: The current status of general relativistic studies on the coalescences of black hole-neutron star binaries is reviewed, highlighting high-precision computations in quasiequilibrium circular orbits and numerical-relativity simulations for the merger process. Understanding of tidal disruption, properties of merger remnant and ejected material, gravitational waveforms, gravitational-wave spectra, and expected electromagnetic counterparts to black hole-neutron star coalescences are summarized.

LIVING REVIEWS IN RELATIVITY (2021)

Add to Collection

Article Astronomy & Astrophysics

Delta-admixed neutron stars: Spinodal instabilities and dUrca processes

Adriana R. Raduta

Summary: Based on the covariant density functional theory of nuclear matter, equations of state of Delta-admixed compact stars are established, with uncertainties in the interaction and phase transition behavior studied. It is found that compact star matter exhibits a first-order phase transition within allowed parameter space, meeting constraints on maximum mass and specific processes simultaneously.

PHYSICS LETTERS B (2021)

Add to Collection

Article Astronomy & Astrophysics

Beta Equilibrium under Neutron Star Merger Conditions

Mark G. Alford et al.

Summary: We calculate the nonzero-temperature correction to the beta equilibrium condition in nuclear matter under neutron star merger conditions, in the temperature range 1mEv < T & LSIM; 5 mEv. We find that the nonzero-temperature correction can be of order 10 to 20 MeV, and plays an important role in the correct calculation of Urca rates, which can be wrong by factors of 10 or more if it is neglected. Our study improves on previous work by using a consistent description of nuclear matter based on relativistic mean field models.

UNIVERSE (2021)

Add to Collection

Article Astronomy & Astrophysics

Equation of State and Composition of Proto-Neutron Stars and Merger Remnants with Hyperons

Armen Sedrakian et al.

Summary: The finite-temperature equation of state and composition of dense nuclear and hypernuclear matter in conditions characteristic of neutron star binary merger remnants and supernovas are discussed. The introduction of Lambda, Xi (-), and Xi (0) hyperons softens the equation of state under various conditions of lepton fractions and temperatures. A special isospin degeneracy point is identified, and the abundance of electron and muon neutrinos under different conditions, such as merger remnants and supernovas, is compared.

UNIVERSE (2021)

Add to Collection

Article Astronomy & Astrophysics

The Radius of PSR J0740+6620 from NICER and XMM-Newton Data

M. C. Miller et al.

Summary: PSR J0740+6620 has a gravitational mass of 2.08 +/- 0.07 solar masses and a radius of 13.7(-1.5)(+2.6) km, providing insights into neutron star core matter properties at high densities consistent with previous measurements and modeling frameworks.

ASTROPHYSICAL JOURNAL LETTERS (2021)

Add to Collection

Article Astronomy & Astrophysics

A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy

Thomas E. Riley et al.

Summary: The study utilizes Bayesian estimation to analyze the radius, mass, and hot surface regions of the massive millisecond pulsar PSR J0740+6620 based on Neutron Star Interior Composition Explorer X-ray Timing Instrument event data. The results show that the equatorial radius of PSR J0740+6620 is approximately 12.39 km, with a mass of about 2.072 solar masses, each reported within a specific posterior credible interval.

ASTROPHYSICAL JOURNAL LETTERS (2021)

Add to Collection

Article Physics, Nuclear

Delta baryons in neutron-star matter under strong magnetic fields

Veronica Dexheimer et al.

Summary: By studying the magnetic field effects on neutron star matter, it is found that both a strong magnetic field and an additional interaction enhance the production of Delta baryons in dense matter while reducing the relative density of other baryons. The magnetic field has little effect on neutron star masses but significantly decreases their radii, leading to a better agreement with observations in both models. This suggests that magnetic neutron stars are likely to contain Delta baryons in their interior.

EUROPEAN PHYSICAL JOURNAL A (2021)

Add to Collection

Article Astronomy & Astrophysics

Constraints on Ξ- nuclear interactions from capture events in emulsion

E. Friedman et al.

Summary: Five Xi p -> Lambda Lambda two-body capture events have been observed in (K-, K+) emulsion exposures at KEK and J-PARC, confirming the Xi-nuclear interaction and achieving consistency between the C-12 and N-14 events. The resulting Xi-nuclear interaction is strongly attractive, with Xi potential depth in nuclear matter V-Xi greater than or similar to 20 MeV, and has implications for multi-strangeness features of dense matter.

PHYSICS LETTERS B (2021)

Add to Collection

Article Astronomy & Astrophysics

Bulk viscosity from Urca processes: npeμ matter in the neutrino-trapped regime

Mark Alford et al.

Summary: This study expands the research on bulk viscosity of npe matter to npeμ matter by incorporating muonic Urca processes and purely leptonic electroweak processes, finding that equilibration rates of Urca processes are higher than pure leptonic processes, bulk viscosity decreases with temperature and exhibits sharp drops at specific temperatures.

PHYSICAL REVIEW D (2021)

Add to Collection

Article Physics, Nuclear

Maximum mass of compact stars from gravitational wave events with finite-temperature equations of state

Sanika Khadkikar et al.

Summary: Researchers have proposed and verified a set of relations regarding the global parameters of hot and fast-rotating compact stars, independent of the equation of state, including a relation between mass-shedding and static configurations. By applying these relations to the GW170817 event, an upper limit on the maximum mass of cold, static neutron stars was deduced, suggesting that considering the temperature of merger remnants can relax previously derived constraints on the maximum mass of cold, static compact stars.

PHYSICAL REVIEW C (2021)

Add to Collection

Article Physics, Nuclear

Strangeness-changing rates and hyperonic bulk viscosity in neutron star mergers

Mark G. Alford et al.

Summary: This paper discusses the computation of rates of strangeness-changing processes and the resultant bulk viscosity in matter at densities and temperatures typical of neutron star mergers, including processes where quarks move between baryons via meson exchange, which provide the dominant contribution to these rates. The study finds that hyperon bulk viscosity can probably be neglected at temperatures in the MeV regime but becomes highly relevant for keV-range temperatures.

PHYSICAL REVIEW C (2021)

Add to Collection

Article Astronomy & Astrophysics

Massive Δ-resonance admixed hypernuclear stars with antikaon condensations

Vivek Baruah Thapa et al.

Summary: Through density functional theory, it was found that (anti)kaon condensation softens the equation of state of compact stars and reduces their maximum mass, occurring through a second-order phase transition without mixed-phase formation. Additionally, inclusion of an additional hidden-strangeness sigma(*) meson in the functional significantly softens the equation of state and delays the onset of (anti)kaons.

PHYSICAL REVIEW D (2021)

Add to Collection

Article Physics, Nuclear

Ξ-nucleus potential for Ξ- quasifree production in the 9Be(K-, K+) reaction

Toru Harada et al.

Summary: This study investigates the Xi(-) production spectrum of the Be-9(K-, K+) reaction at 1.8 GeV/c using the optimal Fermi-averaged K- p -> K+ Xi(-) amplitude within the distorted-wave impulse approximation. The analysis clarifies the weak attraction in the Xi-nucleus potential for Xi(-)-Li-8 and emphasizes the importance of the energy dependence of the Fermi-averaged K- -> p -> K+ amplitude in nuclear reactions. The calculated results show that the Xi-nucleus potential, particularly in the Xi(-)-Li-8 system, can sufficiently explain the data in the Xi(-) quasifree region.

PHYSICAL REVIEW C (2021)

Add to Collection

Article Astronomy & Astrophysics

Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar

H. T. Cromartie et al.

NATURE ASTRONOMY (2020)

Add to Collection

Article Astronomy & Astrophysics

The overarching framework of core-collapse supernova explosions as revealed by 3D FORNAX simulations

Adam Burrows et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

Add to Collection

Article Physics, Nuclear

ΛΛ and NΞ interactions from lattice QCD near the physical point

Kenji Sasaki et al.

NUCLEAR PHYSICS A (2020)

Add to Collection

Article Physics, Nuclear

Light clusters in dilute heavy-baryon admixed nuclear matter

Armen Sedrakian

EUROPEAN PHYSICAL JOURNAL A (2020)

Add to Collection

Article Astronomy & Astrophysics

Proto-neutron stars with heavy baryons and universal relations

Adriana R. Raduta et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

Add to Collection

Article Astronomy & Astrophysics

Bulk Viscous Damping of Density Oscillations in Neutron Star Mergers

Mark Alford et al.

PARTICLES (2020)

Add to Collection

Article Astronomy & Astrophysics

Charged-current muonic reactions in core-collapse supernovae

Gang Guo et al.

PHYSICAL REVIEW D (2020)

Add to Collection

Article Astronomy & Astrophysics

Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes

Jia Jie Li et al.

PHYSICAL REVIEW D (2020)

Add to Collection

Article Astronomy & Astrophysics

Equation of State and Progenitor Dependence of Stellar-mass Black Hole Formation

Andre da Silva Schneider et al.

ASTROPHYSICAL JOURNAL (2020)

Add to Collection

Article Physics, Nuclear

Thermodynamics conditions of matter in neutron star mergers

Albino Perego et al.

EUROPEAN PHYSICAL JOURNAL A (2019)

Add to Collection

Review Physics, Nuclear

Gravitational waves from neutron star mergers and their relation to the nuclear equation of state

Luca Baiotti

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS (2019)

Add to Collection

Article Astronomy & Astrophysics

Neutron Star Mergers: Probing the EoS of Hot, Dense Matter by Gravitational Waves

Matthias Hanauske et al.

PARTICLES (2019)

Add to Collection

Article Physics, Nuclear

Damping of density oscillations in neutrino-transparent nuclear matter

Mark G. Alford et al.

PHYSICAL REVIEW C (2019)

Add to Collection

Article Astronomy & Astrophysics

PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter

M. C. Miller et al.

ASTROPHYSICAL JOURNAL LETTERS (2019)

Add to Collection

Article Astronomy & Astrophysics

A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation

T. E. Riley et al.

ASTROPHYSICAL JOURNAL LETTERS (2019)

Add to Collection

Article Physics, Nuclear

Constraining compact star properties with nuclear saturation parameters

Jia Jie Li et al.

PHYSICAL REVIEW C (2019)

Add to Collection

Article Astronomy & Astrophysics

Implications from GW170817 for Δ-isobar Admixed Hypernuclear Compact Stars

Jia Jie Li et al.

ASTROPHYSICAL JOURNAL LETTERS (2019)

Add to Collection

Article Astronomy & Astrophysics

Interplay between Delta Particles and Hyperons in Neutron Stars

Patricia Ribes et al.

ASTROPHYSICAL JOURNAL (2019)

Add to Collection

Article Astronomy & Astrophysics

Bulk viscosity of baryonic matter with trapped neutrinos

Mark Alford et al.

PHYSICAL REVIEW D (2019)

Add to Collection

Article Physics, Nuclear

Hot quark matter and (proto-) neutron stars

German Malfatti et al.

PHYSICAL REVIEW C (2019)

Add to Collection

Article Astronomy & Astrophysics

Competition between delta isobars and hyperons and properties of compact stars

Jia Jie Li et al.

PHYSICS LETTERS B (2018)

Add to Collection

Article Astronomy & Astrophysics

Relativistic Mean-Field Models with Different Parametrizations of Density Dependent Couplings

Stefan Typel

PARTICLES (2018)

Add to Collection

Article Physics, Nuclear

Neutron star matter with Δ isobars in a relativistic quark model

Himanshu S. Sahoo et al.

PHYSICAL REVIEW C (2018)

Add to Collection

Article Astronomy & Astrophysics

Exploring Fundamentally Three-dimensional Phenomena in High-fidelity Simulations of Core-collapse Supernovae

Evan P. O'Connor et al.

ASTROPHYSICAL JOURNAL (2018)

Add to Collection

Article Physics, Nuclear

β equilibrium in neutron-star mergers

Mark G. Alford et al.

PHYSICAL REVIEW C (2018)

Add to Collection

Article Physics, Nuclear

Delta isobars in relativistic mean-field models with σ-scaled hadron masses and couplings

E. E. Kolomeitsev et al.

NUCLEAR PHYSICS A (2017)

Add to Collection

Article Physics, Multidisciplinary

Muon Creation in Supernova Matter Facilitates Neutrino-Driven Explosions

R. Bollig et al.

PHYSICAL REVIEW LETTERS (2017)

Add to Collection

Review Physics, Multidisciplinary

Binary neutron star mergers: a review of Einstein's richest laboratory

Luca Baiotti et al.

REPORTS ON PROGRESS IN PHYSICS (2017)

Add to Collection

Article Physics, Nuclear

Relativistic mean-field models with scaled hadron masses and couplings: Hyperons and maximum neutron star mass

K. A. Maslov et al.

NUCLEAR PHYSICS A (2016)

Add to Collection

Article Physics, Nuclear

Δ(1232) effects in density-dependent relativistic Hartree-Fock theory and neutron stars

Zhen-Yu Zhu et al.

PHYSICAL REVIEW C (2016)

Add to Collection

Review Astronomy & Astrophysics

The multi-messenger picture of compact binary mergers

Stephan Rosswog

INTERNATIONAL JOURNAL OF MODERN PHYSICS D (2015)

Add to Collection

Article Physics, Nuclear

Critical density and impact of Δ(1232) resonance formation in neutron stars

Bao-Jun Cai et al.

PHYSICAL REVIEW C (2015)

Add to Collection

Article Physics, Particles & Fields

CompOSE CompStar online supernova equations of state harmonising the concert of nuclear physics and astrophysics compose.obspm.fr

S. Typel et al.

PHYSICS OF PARTICLES AND NUCLEI (2015)

Add to Collection

Article Astronomy & Astrophysics

The Explosion Mechanism of Core-Collapse Supernovae: Progress in Supernova Theory and Experiments

Thierry Foglizzo et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA (2015)

Add to Collection

Article Astronomy & Astrophysics

EQUATION OF STATE FOR NEUTRON STARS WITH HYPERONS AND QUARKS IN THE RELATIVISTIC HARTREE-FOCK APPROXIMATION

Tsuyoshi Miyatsu et al.

ASTROPHYSICAL JOURNAL (2015)

Add to Collection

Article Astronomy & Astrophysics

MANY-BODY FORCES IN THE EQUATION OF STATE OF HYPERONIC MATTER

R. O. Gomes et al.

ASTROPHYSICAL JOURNAL (2015)

Add to Collection

Article Physics, Nuclear

Hypernuclear matter in a complete SU(3) symmetry group

Luiz L. Lopes et al.

PHYSICAL REVIEW C (2014)

Add to Collection

Article Physics, Nuclear

Early appearance of Δ isobars in neutron stars

Alessandro Drago et al.

PHYSICAL REVIEW C (2014)

Add to Collection

Article Astronomy & Astrophysics

Constraining hypernuclear density functional with Λ-hypernuclei andcompact stars

E. N. E. van Dalen et al.

PHYSICS LETTERS B (2014)

Add to Collection

Article Physics, Nuclear

Hypernuclear matter in strong magnetic field

Monika Sinha et al.

NUCLEAR PHYSICS A (2013)

Add to Collection

Article Physics, Nuclear

Equation of state of hypernuclear matter: Impact of hyperon-scalar-meson couplings

Giuseppe Colucci et al.

PHYSICAL REVIEW C (2013)

Add to Collection

Article Astronomy & Astrophysics

BLACK HOLE FORMATION IN FAILING CORE-COLLAPSE SUPERNOVAE

Evan O'Connor et al.

ASTROPHYSICAL JOURNAL (2011)

Add to Collection

Article Astronomy & Astrophysics

NEUTRON STARS WITH SMALL RADII-THE ROLE OF Δ RESONANCES

Torsten Schuerhoff et al.

ASTROPHYSICAL JOURNAL LETTERS (2010)

Add to Collection

Article Astronomy & Astrophysics

Dynamics and neutrino signal of black hole formation in nonrotating failed supernovae. I. Equation of state dependence

K. Sumiyoshi et al.

ASTROPHYSICAL JOURNAL (2007)

Add to Collection

Review Physics, Multidisciplinary

Theory of core-collapse supernovae

H.-Th. Janka et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2007)

Add to Collection

Article Physics, Nuclear

New relativistic mean-field interaction with density-dependent meson-nucleon couplings

GA Lalazissis et al.

PHYSICAL REVIEW C (2005)

Add to Collection

© Peeref 2019-2024. All rights reserved.