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Related papers: Pulsar Populations and Unidentified Gamma-Ray Sour…

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A year after \emph{Fermi} was launched, the number of known gamma-ray pulsars has increased dramatically. For the first time, a sizable population of pulsars has been discovered in gamma-ray data alone. For the first time, millisecond…

High Energy Astrophysical Phenomena · Physics 2009-12-21 L. Guillemot , Fermi LAT Collaboration

[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…

A subset of the unidentified EGRET gamma-ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-term variability and their spatial distribution indicate that…

Astrophysics · Physics 2009-11-10 I. A. Grenier , M. M. Kaufman Bernado , G. E. Romero

The diffuse gamma-rays in the Galactic center region have been studied. We propose that there exists a population of millisecond pulsars (MSPs) in the Galactic Center, which will emit GeV gamma-rays through the synchrotron-curvature…

Astrophysics · Physics 2009-11-10 W. Wang , Z. J. Jiang , K. S. Cheng

The identity of the persistent EGRET sources in the Galactic plane is largely a mystery. For one of these, 3EG J2227+6122, our complete census of X-ray and radio sources in its error circle reveals a remarkable superposition of an…

Astrophysics · Physics 2009-10-31 J. P. Halpern , E. V. Gotthelf , K. M. Leighly , D. J. Helfand

Here we investigate to what extent unresolved \gr pulsars contribute to the galactic diffuse emission, and further whether unresolved \gr pulsars can be made responsible for the excess of diffuse galactic emission above 1 GeV which has been…

Astrophysics · Physics 2009-10-30 Martin Pohl

Population synthesis is used to study the contribution from undetected sources to the Galactic ridge emission measured by EGRET. Synthesized source counts are compared with the 3rd EGRET catalogue at low and high latitudes. For pulsar-like…

Astrophysics · Physics 2008-11-26 A. W. Strong

Microquasars, X-ray binary systems that generate relativistic jets, were discovered in our Galaxy in the last decade of the XXth century. Their name indicates that they are manifestations of the same physics as quasars but on a completely…

Astrophysics · Physics 2009-11-11 M. M. Kaufman Bernado

Population studies of EGRET gamma-ray sources indicate that there is a distinctive population of bright sources at low galactic latitudes. The sources have a distribution consistent with that of young galactic objects, with a concentration…

Astrophysics · Physics 2009-11-10 Valenti Bosch-Ramon , Gustavo E. Romero , Josep M. Paredes

The Fermi Large Area Telescope (LAT) has revealed a mysterious extended excess of GeV gamma-ray emission around the Galactic Center, which can potentially be explained by unresolved emission from a population of pulsars, particularly…

We present three new binary pulsars discovered during a search for pulsations in 56 unidentified mid-latitude EGRET gamma-ray error boxes with the Parkes multibeam receiver. Timing observations of these sources is on-going with both the…

Young energetic pulsars will likely be the largest class of Galactic sources observed by GLAST, with many hundreds detected. Many will be unknown as radio pulsars, making pulsation detection dependent on radio and/or x-ray observations or…

Astrophysics · Physics 2009-06-23 Scott M. Ransom

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…

High Energy Astrophysical Phenomena · Physics 2018-07-11 Kaustubh Rajwade , Jayanth Chennamangalam , Duncan Lorimer , Aris Karastergiou

The Fermi Gamma-Ray Space Telescope has discovered many gamma-ray pulsars, both as radio-loud objects and radio-quiet or radio-weak pulsars that have been identified through blind period searches. The latter presumably have gamma-ray beams…

High Energy Astrophysical Phenomena · Physics 2010-02-02 Marco Pierbattista , Isabelle Grenier , Alice Harding , Peter Gonthier

The recent detection of extended $\gamma$-ray emission around middle-aged pulsars is interpreted as inverse-Compton scattering of ambient photons by electron-positron pairs escaping the pulsar wind nebula, which are confined near the system…

High Energy Astrophysical Phenomena · Physics 2024-11-12 S. Abdollahi , F. Acero , A. Acharyya , A. Adelfio , M. Ajello , L. Baldini , J. Ballet , C. Bartolini , J. Becerra Gonzalez , R. Bellazzini , E. Bissaldi , R. Bonino , P. Bruel , R. A. Cameron , P. A. Caraveo , D. Castro , E. Cavazzuti , C. C. Cheung , N. Cibrario , S. Ciprini , G. Cozzolongo , P. Cristarella Orestano , A. Cuoco , S. Cutini , F. D'Ammando , N. Di Lalla , A. Dinesh , L. Di Venere , A. Domínguez , A. Fiori , S. Funk , P. Fusco , F. Gargano , C. Gasbarra , D. Gasparrini , S. Germani , F. Giacchino , N. Giglietto , M. Giliberti , F. Giordano , M. Giroletti , D. Green , I. A. Grenier , L. Guillemot , S. Guiriec , R. Gupta , M. Hashizume , E. Hays , J. W. Hewitt , D. Horan , X. Hou , T. Kayanoki , M. Kuss , A. Laviron , M. Lemoine-Goumard , A. Liguori , J. Li , I. Liodakis , P. Loizzo , F. Longo , F. Loparco , L. Lorusso , M. N. Lovellette , P. Lubrano , S. Maldera , D. Malyshev , G. Martí-Devesa , P. Martin , M. N. Mazziotta , I. Mereu , P. F. Michelson , N. Mirabal , W. Mitthumsiri , T. Mizuno , P. Monti-Guarnieri , M. E. Monzani , A. Morselli , I. V. Moskalenko , M. Negro , N. Omodei , M. Orienti , E. Orlando , D. Paneque , G. Panzarini , M. Persic , M. Pesce-Rollins , R. Pillera , T. A. Porter , S. Rainò , R. Rando , M. Razzano , A. Reimer , O. Reimer , M. Rocamora Bernal , M. Sánchez-Conde , P. M. Saz Parkinson , D. Serini , C. Sgrò , E. J. Siskind , D. A. Smith , G. Spandre , P. Spinelli , A. W. Strong , D. J. Suson , H. Tajima , J. B. Thayer , D. F. Torres , J. Valverde , Z. Wadiasingh , K. Wood , G. Zaharijas

This Chapter provides a review of $\gamma$-ray sources lying at high Galactic latitudes. Their statistical properties and variability status, as well as studies involving cross correlations with lower frequency catalogs and multiwavelength…

Astrophysics · Physics 2007-05-23 Diego F. Torres

The detection of radio pulsars within the central few parsecs of the Galaxy would provide a unique probe of the gravitational and magneto-ionic environments in the Galactic Center (GC) and, if close enough to Sgr A*, precise tests of…

High Energy Astrophysical Phenomena · Physics 2012-07-12 R. S. Wharton , S. Chatterjee , J. M. Cordes , J. S. Deneva , T. J. W. Lazio

We study the $\gamma$-ray emission from the pulsar magnetosphere based on outer gap models, and the TeV radiation from pulsar wind nebulae (PWNe) through inverse Compton scattering using a one-zone model. We showed previously that GeV…

Astrophysics · Physics 2009-11-10 W. Wang , Z. J. Jiang , C. S. J. Pun , K. S. Cheng

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…

The nearby, 30 to 40 Myr old, starburst region of the Gould Belt has formed numerous massive stars. Within its 300 pc radius, it produces core-collapse supernovae at an enhanced rate which is shown to be 75 to 95 Myr{-1} kpc{-2}, i.e. 3 to…

Astrophysics · Physics 2016-08-30 I. A. Grenier