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Precise astrometric measurement with Gaia satellite resulted in the discovery of tens of wide binary systems consisting of a Sun-like star and an invisible component. The latter can be a white dwarf, a neutron star, or a black hole. In this…

High Energy Astrophysical Phenomena · Physics 2025-01-28 Marina Afonina , Sergei Popov

The merger of a neutron star binary may result in the formation of a rapidly-spinning magnetar. The magnetar can potentially survive for seconds or longer as a supramassive neutron star before collapsing to a black hole if, indeed, it…

High Energy Astrophysical Phenomena · Physics 2016-11-09 Wen-fai Fong , Brian D. Metzger , Edo Berger , Feryal Ozel

We analyze the evolutionary status of recently discovered long-period radio sources PSR J0901-4046, GLEAM-X J1627-52, and GPM J1839-10. We discuss the hypothesis that all three sources are radio pulsars. In the framework of standard…

High Energy Astrophysical Phenomena · Physics 2023-10-31 M. D. Afonina , A. V. Biryukov , S. B. Popov

Millisecond pulsars (MSPs) are a growing class of gamma-ray emitters. Pulsed gamma-ray signals have been detected from more than 40 MSPs with the Fermi Large Area Telescope (LAT). The wider radio beams and more compact magnetospheres of…

High Energy Astrophysical Phenomena · Physics 2014-06-24 T. J. Johnson , C. Venter , A. K. Harding , L. Guillemot , D. A. Smith , M. Kramer , O. Celik , P. R. den Hartog , E. C. Ferrara , X. Hou , J. Lande , P. S. Ray

The magnetic deformation of magnetars is affected by their internal magnetic fields, which are generally difficult to be measured directly through observations. In this work, the periodic pulse-phase modulations in the hard X-ray emissions…

High Energy Astrophysical Phenomena · Physics 2025-01-07 Jie Shu , Quan Cheng , Xiao-Ping Zheng

Motivated by the recent detection of ultra-long period radio transients, we investigate new models of coherent radio emission via low-altitude electron-positron pair production in neutron stars beyond rotationally-powered curvature…

High Energy Astrophysical Phenomena · Physics 2024-07-24 A. J. Cooper , Z. Wadiasingh

We investigate the birth and evolution of isolated radio pulsars using a population synthesis method, modeling the birth properties of the pulsars, their time evolution, and their detection in the Parkes and Swinburne Multibeam (MB)…

Astrophysics · Physics 2007-10-25 C. -A. Faucher-Giguere , V. M. Kaspi

We present a model for pulsar radio eclipses in some binary systems, and test this model for PSRs B1957+20 and J2051-0827. We suggest that in these binaries the companion stars are degenerate dwarfs with strong surface magnetic fields. The…

Astrophysics · Physics 2009-10-31 David Khechinashvili , George Melikidze , Janusz Gil

Long-period transients (LPTs) are a new and enigmatic class of objects that produce bright pulsations in the radio, with periods far exceeding those seen in rotationally powered pulsars. The proposed progenitors for LPTs are contested, with…

The appearance of subsonic propellers situated in a strong wind is discussed. We show that it is similar to the appearance of anomalous X-ray pulsars (AXPs) provided the mass and the magnetic moment of neutron stars are 1.4 solar masses,…

Astrophysics · Physics 2009-11-10 N. R. Ikhsanov , C. -S. Choi

Long period radio transients (LPTs) are periodic radio sources showing pulsed emission on timescales from minutes to hours. The underlying sources behind this emission are currently unclear. There are two leading candidates: neutron stars…

Providing a link between magnetars and radio pulsars, high magnetic field neutron stars are ideal targets to investigate how bursting/magnetospheric activity and braking torque variations are connected to rotational glitches. The last…

High Energy Astrophysical Phenomena · Physics 2015-06-23 D. Antonopoulou , P. Weltevrede , C. M. Espinoza , A. L. Watts , S. Johnston , R. M. Shannon , M. Kerr

The initial spin periods of newborn magnetars are \textbf{strongly associated with the origin of their strong magnetic fields, both of which can affect the electromagnetic radiation and gravitational waves (GWs) emitted at their birth.}…

High Energy Astrophysical Phenomena · Physics 2024-11-01 Yu-Long Yan , Quan Cheng , Xiao-Ping Zheng , Xia-Xia Ouyang

Magnetars occupy the neutron star population, with magnetic field strengths of more than 10e12 G. They have been proposed as one of the most likely progenitor models for the phenomenon of energetic, ms-duration, extragalactic radio bursts…

High Energy Astrophysical Phenomena · Physics 2026-04-22 Marlon L. Bause , Kamalpreet Kaur , Isabella Rammala-Zitha , Laura G. Spitler

Glitches are common phenomena in pulsars. After each glitch, there is usually a permanent increase in the pulsar's spin-down rate. Therefore a pulsar's present spin-down rate may be much higher than its initial value. Thus the…

Astrophysics · Physics 2007-05-23 J. R. Lin , S. N. Zhang

The X-ray and gamma-ray spectrum of rotation-powered millisecond pulsars is investigated in a model for acceleration and pair cascades on open field lines above the polar caps. Although these pulsars have low surface magnetic fields, their…

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

We have made polarimetric monitoring observations of millisecond pulsars visible from the northern hemisphere at 1410 MHz. Their emission properties are compared with those of normal pulsars. Although we demonstrated in paper I that…

It is shown that the ion-proton magnetosphere is unstable in a limited area of the P - Pdot plane against transitions to a self-sustaining inverse Compton scattering mode in which the particles accelerated are mainly protons with a small…

High Energy Astrophysical Phenomena · Physics 2018-08-08 P. B. Jones

Magnetars are the most strongly magnetized compact objects known in the Universe and are regarded as one of the primary engines powering a variety of enigmatic, high-energy transients. However, our understanding of magnetars remains highly…

We present a new method to investigate the effective magnetic field decay of isolated neutron stars, from the analysis of the long-term timing data of a large sample of radio pulsars \citep{2010MNRAS.402.1027H}. There are some differences…

High Energy Astrophysical Phenomena · Physics 2019-08-07 Yi Xie , Shuang-Nan Zhang