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We present a population synthesis study of the observed properties of the magnetars, which allows for X-ray selection effects, investigating the hypothesis that they are drawn from a population of progenitors that are more massive than…

Astrophysics · Physics 2009-11-13 Lilia Ferrario , D. T. Wickramasinghe

We investigate the spin-period evolutions of recycled pulsars in binary accreting systems. Taking both the accretion induced field decay and spin-up into consideration, we calculate their spin-period evolutions influenced by the initial…

High Energy Astrophysical Phenomena · Physics 2015-05-20 J. Wang , C. M. Zhang , Y. H. Zhao , Y. Kojima , H. X. Yin , L. M. SOng

It is shown that the drift waves near the light cylinder can cause the modulation of the emission with periods of the order several seconds. These periods explain the intervals between successive pulses observed in "magnetars" and radio…

Astrophysics · Physics 2009-11-11 D. Lomiashvili , G. Machabeli , I. Malov

Millisecond pulsar (MSP) binaries are unique laboratories for studying matter and radiation under extreme conditions that are unattainable on Earth. Recent detections of optical millisecond pulsations from three systems in distinct…

In this letter we discuss two possible reasons which cause the observed braking indices n of young radio pulsars to be smaller than 3: (a) the evolving spin-down model of the magnetic field component $B_{\perp}$ increases with time; (b) the…

Astrophysics · Physics 2009-11-11 W. C. Chen , X. D. Li

The first extrasolar planets were discovered in 1992 around the millisecond pulsar PSR 1257+12. We show that recent developments in the study of accretion onto magnetized stars, plus the existence of the innermost, moon-sized planet in the…

Astrophysics · Physics 2009-10-31 M. Coleman Miller , Douglas P. Hamilton

A relativistic degenerate neutron gas in equilibrium with a background of electrons and protons in a magnetic field exerts its pressure anisotropically, having a smaller value perpendicular than along the magnetic field. For critical fields…

Astrophysics · Physics 2009-01-07 A. Perez Martinez , H. Perez Rojas , H. J. Mosquera Cuesta

One of the possible mechanisms responsible for the panoply of shapes in planetary nebulae is the presence of magnetic fields that drive the ejection of ionized material during the proto-planetary nebula phase. Therefore, detecting magnetic…

Solar and Stellar Astrophysics · Physics 2015-06-18 F. Leone , R. L. M. Corradi , M. J. Martínez González , A. Asensio Ramos , R. Manso Sainz

It is assumed that long range coherent magnetic fields in the universe were spontaneously generated at high temperature due to vacuum polarization of non-Abelian gauge fields, and resulted in the present intergalaxy magnetic field. The zero…

High Energy Physics - Phenomenology · Physics 2011-06-27 E. Elizalde , V. Skalozub

We analyse the origin of the magnetic field decay in normal radio pulsars found by us in a recent study. This decay has a typical time scale $\sim 4 \times 10^5$~yrs, and operates in the range $\sim 10^5$~--~few$\times 10^5$~yrs. We…

High Energy Astrophysical Phenomena · Physics 2015-07-30 A. P. Igoshev , S. B. Popov

The origin and evolution of magnetic fields of neutron stars from birth has long been a source of debate. Here, motivated by recent simulations of the Hall cascade with magnetic helicity, we invoke a model where the large-scale magnetic…

High Energy Astrophysical Phenomena · Physics 2023-07-27 Nikhil Sarin , Axel Brandenburg , Brynmor Haskell

Pulsars have been recognized as normal neutron stars or quark stars. Sub-millisecond pulsars, if detected, would play an essential and important role in distinguishing quark stars from neutron stars. A key question is how sub-millisecond…

Astrophysics · Physics 2008-11-20 Yuanjie Du , R. X. Xu , G. J. Qiao , J. L. Han

The theory of radiatively driven winds successfully explains the key points of the stellar winds of hot massive stars. However, there is an apparent break-down of this paradigm at L/Lsun<5.2: the stellar wind momentum is smaller than…

Solar and Stellar Astrophysics · Physics 2010-10-12 Miriam Garcia , Francisco Najarro , Artemio Herrero

We consider the expulsion of proton fluxoids along neutron vortices from the superfluid/superconductive core of neutron star with weak ($B<10^{10}$ G) magnetic field. The velocity of fluxoids is calculated from the balance of buoyancy, drag…

Astrophysics · Physics 2009-11-06 D. Konenkov , U. Geppert

Binary millisecond pulsars (MSPs) are detached binary systems consisting of a MSP and a He white dwarf. If the initial orbital periods of binary MSPs are less than 0.3 day, they would evolve toward ultra-compact binary pulsars due to the…

High Energy Astrophysical Phenomena · Physics 2021-10-22 Wen-Cong Chen

In this review paper we explain the following gamma-ray emission features from the millisecond pulsars. (1)Why is the dipolar field of millisecond pulsars so weak but the magnetic pair creation process may still be able to control the size…

High Energy Astrophysical Phenomena · Physics 2015-06-17 K. S. Cheng

In this work, we study the effect of the symmetry slope on the observables of weakly and strongly magnetized neutron stars within the chaotic magnetic field approximation. We investigate the impact of the symmetry energy slope in the…

High Energy Astrophysical Phenomena · Physics 2026-04-27 Luiz L. Lopes , Cesar V. Flores , Débora P. Menezes

There is growing evidence, based on both X-ray and radio observations of isolated neutron stars, that besides the large--scale (dipolar) magnetic field, which determines the pulsar spin--down behaviour, small--scale poloidal field…

Astrophysics · Physics 2009-11-10 U. Geppert , M. Rheinhardt , J. Gil

Main sequence stars and compact objects like white dwarfs and neutron stars are usually embedded in magnetic fields that strongly deviate from a pure dipole located right at the stellar centre. An off-centred dipole can sometimes better…

High Energy Astrophysical Phenomena · Physics 2020-10-28 J. Pétri

We used the magneto-dipole radiation mechanism for the braking of radio pulsars to calculate the new values of magnetic inductions at the surfaces of neutron stars. For this aim we estimated the angles ? between the rotation axis and the…

General Physics · Physics 2017-07-26 E. B. Nikitina , I. F. Malov
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