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相关论文: The Galactic population and properties of young, h…

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Pulsars are rapidly rotating neutron stars that emit radiation across the electromagnetic spectrum, from radio to gamma-rays. We use the rapid binary population synthesis suite COMPAS to model the Galactic population of canonical pulsars.…

高能天体物理现象 · 物理学 2025-10-15 Yuzhe Song , Simon Stevenson , Debatri Chattopadhyay , Joshua Tan , Timothy A. D. Paglione

Pulsars are highly magnetized rotating neutron stars, emitting in a broad electromagnetic energy range. Reproducing the observed pulsars population refines our understanding of their formation and evolution scenarios as well as their…

高能天体物理现象 · 物理学 2024-11-27 Mattéo Sautron , Jérôme Pétri , Dipanjan Mitra , Ludmilla Dirson

We simulate the characteristics of the Galactic population of radio and $\gamma$-ray pulsars using Monte Carlo techniques. At birth, neutron stars are spatially distributed in the Galactic disk, with supernova-kick velocities, and randomly…

天体物理学 · 物理学 2019-08-17 Peter L. Gonthier , Michelle S. Ouellette , Joel Berrier , Shawn O'Brien , Alice K. Harding

We have simulated a Galactic population of young pulsars and compared with the Fermi LAT sample, constraining the birth properties, beaming and evolution of these spin-powered objects. Using quantitative tests of agreement with the…

高能天体物理现象 · 物理学 2015-05-20 Kyle P. Watters , Roger W. Romani

Current wisdom accounts to the diversity of neutron star observational manifestations to their birth scenarios, influencing their thermal and magnetic field evolution. Among the kind of observed neutron stars, radio pulsars represent by far…

高能天体物理现象 · 物理学 2022-11-16 Ludmilla Dirson , Jérôme Pétri , Dipanjan Mitra

We apply a likelihood analysis to pulsar detections, pulsar upper limits, and diffuse background measurements from the OSSE and EGRET instruments on the Compton Gamma Ray Observatory to constrain the luminosity law for gamma-ray pulsars and…

天体物理学 · 物理学 2009-10-31 M. A. McLaughlin , J. M. Cordes

Currently three isolated radio pulsars and one binary radio pulsar with no evidence of any previous recycling are known in 97 surveyed Galactic globular clusters. As pointed out by Lyne et al., the presence of these pulsars cannot be…

We investigate the radio and gamma-ray beaming properties of normal and millisecond pulsars by selecting two samples from the known populations. The first, Sample G, contains pulsars which are detectable in blind searches of gamma-ray data…

高能天体物理现象 · 物理学 2015-05-18 V. Ravi , R. N. Manchester , G. Hobbs

We review current understanding of the underlying, as opposed to the observed, pulsar population. The observed sample is heavily biased by selection effects, so that surveys see less than 10% of all potentially observable pulsars. We…

天体物理学 · 物理学 2007-05-23 D. R. Lorimer

With the large sample of young gamma-ray pulsars discovered by the Fermi Large Area Telescope (LAT), population synthesis has become a powerful tool for comparing their collective properties with model predictions. We synthesised a pulsar…

高能天体物理现象 · 物理学 2015-06-05 M. Pierbattista , I. A. Grenier , A. K. Harding , P. L. Gonthier

[ABRIDGED] We present the discovery and follow-up observations of 142 pulsars found in the Parkes 20-cm multibeam pulsar survey of the Galactic plane. These new discoveries bring the total number of pulsars found by the survey to 742. In…

The EGRET telescope on the Compton Gamma-Ray Observatory detected over 200 sources and the majority of these are still unidentified. At least three subpopulations of EGRET sources have been associated with the Galaxy: bright sources lying…

天体物理学 · 物理学 2009-11-10 A. K. Harding , P. L. Gonthier , I. A. Grenier , C. A. Perrot

We present results of our pulsar population synthesis of ordinary isolated and millisecond pulsars in the Galactic plane. Over the past several years, a program has been developed to simulate pulsar birth, evolution and emission using Monte…

天体物理学 · 物理学 2008-11-26 Peter L. Gonthier , Sarah A. Story , Brian D. Clow , Alice K. Harding

We collate the evidence for rotation-powered neutron stars that are visible as X-ray sources and not as radio pulsars. Quantitative upper limits exist for the radio fluxes of eight objects, revealing a population at least an order of…

天体物理学 · 物理学 2009-10-30 K. T. S. Brazier , S. Johnston

Most population studies of pulsars have hitherto focused on the disc of the Galaxy, the Galactic centre, globular clusters, and nearby galaxies. It is expected that pulsars, by virtue of their natal kicks, are also to be found in the…

高能天体物理现象 · 物理学 2018-07-11 Kaustubh Rajwade , Jayanth Chennamangalam , Duncan Lorimer , Aris Karastergiou

Rotating radio transients (RRATs) represent a significant but poorly understood component of the Galactic neutron star population, characterized by sporadic emission first detectable only through single-pulse searches. We present the…

高能天体物理现象 · 物理学 2026-05-04 Devansh Agarwal , Evan F. Lewis , Duncan R. Lorimer , Maura A. McLaughlin , Bingyi Cui , Anna Turner , Natasha McMann

Gamma-ray observations have shown pulsars to be efficient converters of rotational energy into GeV photons and it is of wide-ranging interest to determine their contribution to the gamma-ray background. We arrive at flux predictions from…

高能天体物理现象 · 物理学 2016-01-26 Ryan M. O'Leary , Matthew D. Kistler , Matthew Kerr , Jason Dexter

We study the $\gamma$-ray emission properties of pulsars by using a new self-consistent outer gap model. The outer gap can exist in pulsars with age over million years old if the effect of magnetic inclination angle as well as the average…

天体物理学 · 物理学 2009-11-10 K. S. Cheng , L. Zhang , P. Leung , Z. J. Jiang

In this paper we compare the characteristics of pulsars with a high spin-down energy loss rate (Edot) against those with a low Edot. We show that the differences in the total intensity pulse morphology between the two classes are in general…

天体物理学 · 物理学 2009-11-13 Patrick Weltevrede , Simon Johnston

Although high-sensitivity surveys have revealed a number of highly dispersed pulsars in the inner Galaxy, none have so far been found in the Galactic centre (GC) region, which we define to be within a projected distance of 1~pc from Sgr~A*.…

高能天体物理现象 · 物理学 2017-08-09 Kaustubh Rajwade , Duncan Lorimer , Loren Anderson
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