scholarly journals Accuracy of the relativistic Cowling approximation in protoneutron star asteroseismology

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Hajime Sotani ◽  
Tomoya Takiwaki
Keyword(s):  
Protoneutron Star

Protoneutron Star Formation

1988 ◽  
Vol 7 (4) ◽  
pp. 371-381
Author(s):  
Adam Burrows
Keyword(s):  
Star Formation ◽  
Neutron Star ◽  
General Analysis ◽  
Sn 1987A ◽  
Supernova Neutrino ◽  
Neutrino Theory ◽  
Protoneutron Star

AbstractThe theory of neutron star formation is addressed in the light of the detected neutrino burst from SN 1987A. A brief review of how supernova neutrino theory has evolved over the last 30 years and a general analysis of the SN 1987A detections is presented.

A NUCLEAR MANY-BODY THEORY AT FINITE TEMPERATURE APPLIED TO A PROTONEUTRON STAR

2002 ◽  
Vol 11 (02) ◽  
pp. 83-104 ◽  
Author(s):  
GUILHERME F. MARRANGHELLO ◽  
CESAR A. Z. VASCONCELLOS ◽  
MANFRED DILLIG ◽  
J. A. DE FREITAS PACHECO
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Finite Temperature ◽  
Degrees Of Freedom ◽  
Many Body ◽  
Many Body Theory ◽  
The Masses ◽  
Protoneutron Stars ◽  
Protoneutron Star

Thermodynamical properties of nuclear matter are studied in the framework of an effective many-body field theory at finite temperature, considering the Sommerfeld approximation. We perform the calculations by using the nonlinear Boguta and Bodmer model, extended by the inclusion of the fundamental baryon octet and leptonic degrees of freedom. Trapped neutrinos are also included in order to describe protoneutron star properties through the integration of the Tolman–Oppenheimer–Volkoff equations, from which we obtain, beyond the standard relations for the masses and radii of protoneutron stars as functions of the central density, new results of these quantities as functions of temperature. Our predictions include: the determination of an absolute value for the limiting mass of protoneutron stars; new structural aspects on the nuclear matter phase transition via the behavior of the specific heat and, through the inclusion of quark degrees of freedom, the properties of a hadron-quark phase transition and hybrid protoneutron stars

scholarly journals Magnetar formation through a convective dynamo in protoneutron stars

2020 ◽  
Vol 6 (11) ◽  
pp. eaay2732 ◽  
Author(s):  
Raphaël Raynaud ◽  
Jérôme Guilet ◽  
Hans-Thomas Janka ◽  
Thomas Gastine
Keyword(s):  
Gamma Ray ◽  
Magnetic Energy ◽  
Three Dimensional ◽  
Observational Constraints ◽  
Rotation Rates ◽  
Theoretical Support ◽  
Firm Basis ◽  
Protoneutron Stars ◽  
Protoneutron Star ◽  
Three Dimensional Simulations

The release of spin-down energy by a magnetar is a promising scenario to power several classes of extreme explosive transients. However, it lacks a firm basis because magnetar formation still represents a theoretical challenge. Using the first three-dimensional simulations of a convective dynamo based on a protoneutron star interior model, we demonstrate that the required dipolar magnetic field can be consistently generated for sufficiently fast rotation rates. The dynamo instability saturates in the magnetostrophic regime with the magnetic energy exceeding the kinetic energy by a factor of up to 10. Our results are compatible with the observational constraints on galactic magnetar field strength and provide strong theoretical support for millisecond protomagnetar models of gamma-ray burst and superluminous supernova central engines.

scholarly journals Protoneutron star evolution and the neutrino-driven wind in general relativistic neutrino radiation hydrodynamics simulations

2010 ◽  
Vol 517 ◽  
pp. A80 ◽  
Author(s):  
T. Fischer ◽  
S. C. Whitehouse ◽  
A. Mezzacappa ◽  
F.-K. Thielemann ◽  
M. Liebendörfer
Keyword(s):  
Radiation Hydrodynamics ◽  
Neutrino Radiation ◽  
Star Evolution ◽  
General Relativistic ◽  
Protoneutron Star

scholarly journals Protoneutron Star Cooling with Convection: The Effect of the Symmetry Energy

2012 ◽  
Vol 108 (6) ◽  
Author(s):  
L. F. Roberts ◽  
G. Shen ◽  
V. Cirigliano ◽  
J. A. Pons ◽  
S. Reddy ◽  
...  
Keyword(s):  
Symmetry Energy ◽  
Protoneutron Star

Gravitational wave generated by mass ejection in protoneutron star neutrino burst

2010 ◽  
Author(s):  
L. G. Almeida ◽  
H. Rodrigues ◽  
D. Portes ◽  
S. B. Duarte ◽  
Marina Nielsen ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Mass Ejection ◽  
Protoneutron Star

LARGE MIXING ANGLE STERILE NEUTRINOS AND PULSAR VELOCITIES

2009 ◽  
Vol 24 (31) ◽  
pp. 2507-2516 ◽  
Author(s):  
LEONARD S. KISSLINGER ◽  
ERNEST M. HENLEY ◽  
MIKKEL B. JOHNSON
Keyword(s):  
Magnetic Field ◽  
Sterile Neutrino ◽  
Effective Volume ◽  
Sterile Neutrinos ◽  
Mixing Angle ◽  
Lowest Landau Level ◽  
Neutrino Emissivity ◽  
Global Fit ◽  
Temperature Equilibrium ◽  
Protoneutron Star

We investigate the momentum given to a protoneutron star, the pulsar kick, during the first ten seconds after temperature equilibrium is reached. Using a model with two sterile neutrinos obtained by fits to the MiniBooNE and LSND experiments, which is consistent with a new global fit, there is a large mixing angle, and the effective volume for emission is calculated. Using formulations with neutrinos created by URCA processes in a strong magnetic field, so the lowest Landau level has a sizable probability, we find that with known parameters, the asymmetric sterile neutrino emissivity might account for large pulsar kicks.

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