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Related papers: High-Energy Radiation from Pulsars : A Three Dimen…

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We analyse 13 yrs of $\textit{Fermi}$-LAT PASS 8 events from 127 gamma-ray emitting millisecond pulsars (MSPs) in the energy range 0.1$-$100 GeV and significantly detect 118 MSPs. We fit the stacked emission with a log parabola (LP)…

High Energy Astrophysical Phenomena · Physics 2024-05-13 Sheridan J. Lloyd , Paula M. Chadwick , Anthony M. Brown

A more realistic description of the magnetosphere is crucial for understanding the radiation emitted by pulsars. In this paper, we revisit the annular gap model by employing a rotating dipole field, which is more realistic than the static…

High Energy Astrophysical Phenomena · Physics 2026-03-26 Jie Tian , Xin Xu , Qijun Zhi , Jiguang Lu , Shijun Dang , Ke Yang , Xiao Wei , Guojun Qiao

We study the pulse morphologies and pulse amplitudes of thermally emitting neutron stars with ultrastrong magnetic fields. The beaming of the radiation emerging from a magnetar was recently shown to be predominantly non-radial, with a small…

Astrophysics · Physics 2009-11-07 Feryal Ozel

(abridged) Although discovered 40 years ago, the emission mechanism responsible for the observed pulsar radiation remains unclear. However, the high-energy pulsed emission is usually explained in the framework of either the polar cap or the…

High Energy Astrophysical Phenomena · Physics 2015-05-13 J. Petri

Millisecond pulsars (MSPs) have been established as a class of high-energy ($\geq$0.1 GeV) emitters with the Large Area Telescope (LAT) aboard the \emph{Fermi Gamma-ray Space Telescope}. Most MSP gamma-ray light curves display sharp peaks…

High Energy Astrophysical Phenomena · Physics 2012-09-19 T. J. Johnson

We discuss non-thermal emission mechanism of the Crab-like pulsars with both a two-dimensional electrodynamical study and a three-dimensional model. We investigate the emission process in the outer gap accelerator. In the two-dimensional…

Astrophysics · Physics 2009-11-13 J. Takata , H. -K. Chang

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

I present a review of the main phenomenological properties at high energies related to massive gamma-ray binaries and I discuss some aspects of pulsar models for these objects.

High Energy Astrophysical Phenomena · Physics 2015-05-14 Gustavo E. Romero

We calculate the gamma-ray lightcurves and spectra of rotation powered pulsars for a wide range of observer's viewing angles, and inclination angles of the magnetic axis to the rotation axis. We show how the shapes of the observed…

Astrophysics · Physics 2007-05-23 Agnieszka Wozna , Jaroslaw Dyks , Tomasz Bulik , Bronislaw Rudak

The sizes of pulsar radio pulses in the plane of the sky are determined. This is important not only in relation to the possibility of directly resolving the radio pulses spatially, but also for verifying and placing constraints on existing…

High Energy Astrophysical Phenomena · Physics 2015-06-23 H. L. Hakobyan , V. S. Beskin

{\it Fermi}-LAT has detected pulsed gamma-ray emissions with high confidences from more than 40 millisecond pulsars (MSPs). Here we study the phase-averaged gamma-ray properties of MSPs by using revised version of a self-consistent outer…

High Energy Astrophysical Phenomena · Physics 2017-02-22 Z. J. Jiang , S. B. Chen , X. Li , L. Zhang

The model of pulsar radio emission is discussed in which a coherent radio emis-sion is excited in a vacuum gap above polar cap of neutron star. Pulsar X and gamma radiation are considered as the result of low-frequency radio emission…

Astrophysics · Physics 2009-06-23 V. M. Kontorovich , A. B. Flanchik

We have performed a Monte-Calro simulation for Galactic population of pulsars and for the $\gamma$-ray observations. We apply outer gap model for the $\gamma$-ray emission process, and study the radiation characteristics as a function of…

High Energy Astrophysical Phenomena · Physics 2015-05-27 J. Takata , Y. Wang , K. S. Cheng

The high-energy emission mechanisms based on the radio photon reprocessing by the ultrarelativistic plasma particles in the open field line tube of a pulsar are considered. The particles are believed to acquire relativistic gyration…

Astrophysics of Galaxies · Physics 2009-04-28 S. A. Petrova

The nine millisecond pulsars (MSPs) that have now been detected by Fermi-LAT are providing an excellent opportunity to probe the emission geometry of these ancient compact objects. As they are radio-loud, one may use the relative phase lags…

High Energy Astrophysical Phenomena · Physics 2009-12-15 C. Venter , A. K. Harding , L. Guillemot

High-energy gamma rays are a valuable tool for studying particle acceleration and radiation in the magnetospheres of energetic pulsars. The six or more pulsars seen by CGRO/EGRET show that: the light curves usually have double-peak…

Astrophysics · Physics 2009-11-06 David J. Thompson

The outer gap model is used here to explain the spectrum and the energy dependent light curves of the X-ray and soft gamma-ray radiations of the spin-down powered pulsar PSR B1509-58.In the outer gap model, most pairs inside the gap are…

High Energy Astrophysical Phenomena · Physics 2013-03-05 Y. Wang , J. Takata , K. S. Cheng

Pulsed gamma-ray emission from millisecond pulsars (MSPs) has been detected by the sensitive Fermi, which sheds light on studies of the emission region and mechanism. In particular, the specific patterns of radio and gamma-ray emission from…

High Energy Astrophysical Phenomena · Physics 2015-06-12 YuanJie Du , GuoJun Qiao , Ding Chen

The pulsar radio emission is commonly associated with the plasma outflow in the open field line tube; then a pencil beam is emitted along the pulsar magnetic axis. Observations suggest that there is an additional radio emission mechanism…

High Energy Astrophysical Phenomena · Physics 2018-12-12 Yuri Lyubarsky

We compute the patterns of $\gamma$-ray emission due to curvature radiation in dissipative pulsar magnetospheres. Our ultimate goal is to construct macrophysical models that are able to reproduce the observed $\gamma$-ray light-curve…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Constantinos Kalapotharakos , Alice K. Harding , Demosthenes Kazanas