On the halo neutron star origin of the gamma-ray bursts: Origin of the halo neutron stars and metal enrichment of the intracluster medium

The first inspiral of two neutron stars observed in gravitational waves was remarkably close, allowing the kind of simultaneous gravitational wave and electromagnetic observation that had not been expected for several years. Their merger, followed by a gamma-ray burst and a kilonova, was observed across the spectral bands of electromagnetic telescopes. These GW and electromagnetic observations have led to dramatic advances in understanding short gamma-ray bursts; determining the origin of the heaviest elements; and determining the maximum mass of neutron stars. From the imprint of tides on the gravitational waveforms and from observations of X-ray binaries, one can extract the radius and deformability of inspiraling neutron stars. Together, the radius, maximum mass, and causality constrain the neutron-star equation of state, and future constraints can come from observations of post-merger oscillations. We selectively review these results, filling in some of the physics with derivations and estimates.

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Distribution of gamma-ray bursts in halo neutron star-comet models

Astrophysics and Space Science ◽

10.1007/bf00658661 ◽

1995 ◽

Vol 231 (1-2) ◽

pp. 419-422

Author(s):

M. G. Higgins ◽

R. N. Henriksen

Keyword(s):

Neutron Star ◽

Gamma Ray ◽

Gamma Ray Bursts ◽

Halo Neutron

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SPINAR MODEL FOR BINARY NEUTRON STAR MERGER

Revista Mexicana de Astronomía y Astrofísica Serie de Conferencias ◽

10.22201/ia.14052059p.2021.53.26 ◽

2021 ◽

Vol 53 ◽

pp. 134-136

Author(s):

A. R. Chasovnikov ◽

V. M. Lipunov ◽

E. S. Gorbovskoy

Keyword(s):

Neutron Star ◽

Neutron Stars ◽

Gamma Ray ◽

Gamma Ray Bursts ◽

Point Of View ◽

Binary Neutron Star ◽

Master System ◽

Robotic Telescopes

We consider the neutron stars mergers from the point of view of the spinar model. We present calculations of the maximum luminosity of merging neutron stars, both total and in optical ranges. The possibility of observing such gamma-ray bursts using the MASTER system of robotic telescopes is also discussed.

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Pan Galactic Gargle Blaster

The Cosmic Mystery Tour ◽

10.1093/oso/9780198831860.003.0017 ◽

2019 ◽

pp. 132-137

Author(s):

Nicholas Mee

Keyword(s):

General Relativity ◽

Neutron Star ◽

Neutron Stars ◽

Gravitational Waves ◽

Gamma Ray ◽

Great Accuracy ◽

Gamma Ray Bursts ◽

Tests Of General Relativity ◽

Binary Neutron Star

The sources of short gamma ray bursts (GRBs) have been identified with neutron star merger events. Hulse and Taylor discovered the first binary neutron star in 1974. By monitoring the pulsar in this system the orbital characteristics of the system have been determined with great accuracy. This has led to tests of general relativity, including the first confirmation of the existence of gravitational waves. The emission of this radiation is gradually bringing the two neutron stars together. They will collide and merge in about 300 million years.

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GAMMA-RAY BURSTS FROM HALO NEUTRON STARS CROSSING DARK CLUSTERS

Modern Physics Letters A ◽

10.1142/s0217732396002162 ◽

1996 ◽

Vol 11 (27) ◽

pp. 2179-2186

Author(s):

F. DE PAOLIS

Keyword(s):

Neutron Stars ◽

Globular Clusters ◽

Flux Distribution ◽

Gamma Ray ◽

Galactic Halo ◽

Outer Part ◽

Gamma Ray Bursts ◽

Halo Neutron ◽

Peak Flux ◽

The Galaxy

Two classes of neutron stars may exist in the galactic halo: high velocity neutron stars originating from the disk and injected in the halo and neutron stars originating from globular clusters (via type II supernovae and/or accretion induced collapse of white dwarfs). Moreover, the halo dark matter is likely in the form of dark clusters made of Massive Astrophysical Compact Halo Objects (MACHOs) and cold molecular clouds, expected to be formed in the outer part of the galaxy. We suggest that halo neutron stars may emit gamma-ray bursts crossing dark clusters. This assumption allows us to explain all the observed properties of gamma-ray bursts (rate, isotropy, cumulative peak flux distribution), including the different spectral properties of the two classes of short and long bursts. Several methods to test this model, independently on observations of gamma-ray bursts, are discussed.

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Gamma Ray Bursts as Death of Magnetized Neutron Stars

International Astronomical Union Colloquium ◽

10.1017/s0252921100041907 ◽

1996 ◽

Vol 160 ◽

pp. 361-362

Author(s):

Hitoshi Hanami

Keyword(s):

Magnetic Field ◽

Black Hole ◽

Neutron Star ◽

Neutron Stars ◽

Strong Magnetic Field ◽

Gamma Ray ◽

Gamma Ray Bursts ◽

Final Phase ◽

Poynting Flux ◽

Free Process

AbstractWe propose magnetic cannon ball mechanism in which the collapse of a magnetosphere onto a black hole can generate strong outward Poynting flux which can drive a baryon-free fireball. This process can occur at the final collapsing phase of a neutron star with strong magnetic field. The magnetic cannon ball can drive a relativistic outflow without the rotation of the central object. This baryon-free process can explain gamma-ray bursts as the final phase of dead pulsars.

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