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We investigate the momentum given to a protoneutron star, the pulsar kick, during the first 10 seconds after temperature equilibrium is reached. Using a model with two sterile neutrinos obtained by fits to the MiniBoone and LSND experiments…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-05 Leonard S. Kisslinger , Ernest M. Henley , Mikkel B. Johnson

New effects of nontrivial neutrino electromagnetic properties are investigated on the basis of exact solutions of the modified Dirac equations for neutrinos in dense magnetized rotating matter. The effect of spatial separation of different…

High Energy Physics - Phenomenology · Physics 2014-06-11 Alexander Studenikin , Ilya Tokarev

In proto-neutron stars with strong magnetic fields, the neutrino-nucleon scattering/absorption cross sections depend on the direction of neutrino momentum with respect to the magnetic field axis, a manifestation of parity violation in weak…

Astrophysics · Physics 2009-10-30 Dong Lai , Y. -Z. Qian

It is thought that isolated neutron stars receive a natal kick velocity at birth nearly aligned with their spin axis. Direct observational confirmation of this alignment is currently limited to a single source in a supernova remnant (PSR…

High Energy Astrophysical Phenomena · Physics 2025-08-13 Anton Biryukov , Gregory Beskin

The existence of pulsars with spin period below one millisecond is expected, though they have not been detected up to now. Their formation depends on the quantity of matter accreted from the companion which, in turn, is limited by the…

RADIO pulsars are thought to born with spin periods of 0.02-0.5 s and space velocities of 100-1000 km/s, and they are inferred to have initial dipole magnetic fields of 10^{11}-10^{13}. The average space velocity of a normal star in the…

Astrophysics · Physics 2015-06-24 H. Spruit , E. S. Phinney

A number of rotation-powered millisecond pulsars are powerful sources of X-ray emission. We present predictions for the spectral characteristics of these sources at gamma-ray energies, using a model for acceleration and pair cascades on…

Astrophysics · Physics 2016-08-30 Alice K. Harding , Vladimir V. Usov , Alex Muslimov

Highly magnetised rapidly spinning neutron stars are widely considered to be natural sites for acceleration of charged particles. Powerful acceleration mechanism due to unipolar induction is thought to operate in the magnetospheres of…

Astrophysics · Physics 2007-05-23 B. Rudak

Neutron stars spin down over time due to a number of energy-loss processes. We provide tantalizing population-based evidence that millisecond pulsars (MSPs) have a minimum ellipticity of $\epsilon\approx10^{-9}$ around their spin axis and…

High Energy Astrophysical Phenomena · Physics 2018-08-23 G. Woan , M. D. Pitkin , B. Haskell , D. I. Jones , P. D. Lasky

Little attention has so far been paid to the division of the observed population between pulsars of the two spin directions that are possible. Almost all pulsars with positive corotational charge density at the polar caps are expected to…

High Energy Astrophysical Phenomena · Physics 2015-06-04 P. B. Jones

The ${\it {spin \ \ light \ \ of \ \ neutrino}}$ ($SL\nu$) is a new possible mechanism of electromagnetic radiation by a massive neutrino (with a nonzero magnetic moment) moving in media. Since the prediction of this mechanism, the question…

High Energy Physics - Phenomenology · Physics 2017-11-29 Alexander Grigoriev , Alexey Lokhov , Alexander Studenikin , Alexei Ternov

We discuss a novel mechanism for the proto-neutron star acceleration assisted by the chiral separation effect which induces an axial vector current in a dense medium. We consider the process of neutrinos scattering off the background axial…

High Energy Physics - Phenomenology · Physics 2024-01-10 Kenji Fukushima , Chengpeng Yu

When a rotating neutron star loses angular momentum, the progressive reduction of the centrifugal force makes it contract. This perturbs each fluid element, raising the local pressure and originating deviations from beta equilibrium,…

Solar and Stellar Astrophysics · Physics 2015-06-23 Nicolás González-Jiménez , Cristobal Petrovich , Andreas Reisenegger

We show that observations of pulsars with pulsed optical emission indicate that the peak flux scales according to the magnetic field strength at the light cylinder. The derived relationships indicate that the emission mechanism is common…

Astrophysics · Physics 2009-10-31 Andy Shearer , Aaron Golden

Pulsars are considered to be the leading explanation for the excess in cosmic-ray positrons detected by PAMELA and AMS-02. A notable feature of standard pulsar models is the sharp spectral cutoff produced by the increasingly efficient…

High Energy Astrophysical Phenomena · Physics 2023-05-24 Isabelle John , Tim Linden

The nearby Supernova 1987A was accompanied by a burst of neutrino emission, which indicates that a compact object (a neutron star or black hole) was formed in the explosion. There has been no direct observation of this compact object. In…

The thermal emission detected from the millisecond pulsar J0437-4715 is not explained by standard cooling models of neutron stars without a heating mechanism. We investigated three heating mechanisms controlled by the rotational braking of…

High Energy Astrophysical Phenomena · Physics 2015-05-18 Denis Gonzalez , Andreas Reisenegger , Rodrigo Fernandez

Collective interactions of a beam of neutrinos/antineutrinos traversing a dense magnetized plasma of electrons/positrons, protons and neutrons are studied with particular reference to the case of a Supernova. We find that the ponderomotive…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. Esposito

Supernova explosions are inherently asymmetric and can accelerate new-born neutron stars (NSs) to hundreds of km/s. Two prevailing theories to explain NS kicks are ejecta asymmetries (e.g., conservation of momentum between NS and ejecta)…

High Energy Astrophysical Phenomena · Physics 2017-08-02 Tyler Holland-Ashford , Laura A. Lopez , Katie Auchettl , Tea Temim , Enrico Ramirez-Ruiz

We are still far from understanding how pulsars pulse, how neutron stars are born, what neutron stars can emit, and in which way they do this. In this short communication, I list 18 alternatives -- several of them old, a few of them new --…

Astrophysics · Physics 2007-05-23 W. Kundt
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