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Related papers: Constraining the Galactic millisecond pulsar popul…

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The recent analyses of the Fermi Large Area Telescope data show an extended GeV $\gamma$-ray excess on top of the expected diffuse background in the Galactic center region, which can be explained with annihilating dark matter or a…

High Energy Astrophysical Phenomena · Physics 2015-04-23 Qiang Yuan , Kunihito Ioka

An interesting new high-energy pulsar sub-population is emerging following early discoveries of gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope (LAT). We present results from 3D emission modeling, including the…

High Energy Astrophysical Phenomena · Physics 2014-11-20 C. Venter , A. K. Harding , L. Guillemot

Observations using the Fermi Large Area Telescope (Fermi-LAT) have found a significant gamma-ray excess surrounding the center of the Milky Way (GC). One possible interpretation of this excess invokes gamma-ray emission from an undiscovered…

High Energy Astrophysical Phenomena · Physics 2016-03-23 Tim Linden

The Large Area Telescope (LAT) on Fermi has detected ~150 gamma-ray pulsars, about a third of which were discovered in blind searches of the $\gamma$-ray data. Because the angular resolution of the LAT is relatively poor and blind searches…

High Energy Astrophysical Phenomena · Physics 2015-06-17 P. M. Saz Parkinson , A. Belfiore , P. Caraveo , A. De Luca , M. Marelli

We report our analysis of the Fermi Large Area Telescope data for 39 millisecond pulsars (MSPs) listed in the second $\gamma$-ray pulsar catalog. Spectra of the pulsars are obtained. We fit the spectra with a function of a power law with…

High Energy Astrophysical Phenomena · Physics 2016-11-09 Yi Xing , Zhongxiang Wang

Using archival {\it Fermi}-LAT data with a time span of $\sim12$ years, we study the population of Millisecond Pulsars (MSPs) in Globular Clusters (GlCs) and investigate their dependence on cluster dynamical evolution in the Milky Way…

Astrophysics of Galaxies · Physics 2024-01-30 Li Feng , Zhongqun Cheng , Wei Wang , Zhiyuan Li , Yang Chen

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…

High Energy Astrophysical Phenomena · Physics 2015-06-05 M. Pierbattista , I. A. Grenier , A. K. Harding , P. L. Gonthier

About one third of the 3033 $\gamma$-ray sources in the Third Fermi-LAT Gamma-ray Source Catalogue (3FGL) are unidentified and do not have even a tentative association with a known object, hence they are defined as unassociated. Among…

High Energy Astrophysical Phenomena · Physics 2017-06-28 D. Salvetti , R. P. Mignani , A. De Luca , M. Marelli , C. Pallanca , A. A. Breeveld , P. Husemann , A. Belfiore , W. Becker , J. Greiner

The Fermi Gamma-ray Space Telescope has revolutionized our knowledge of the gamma-ray pulsar population, leading to the discovery of almost 100 gamma-ray pulsars and dozens of gamma-ray millisecond pulsars (MSPs). Although the outer-gap…

High Energy Astrophysical Phenomena · Physics 2015-06-03 A. K. H. Kong , R. H. H. Huang , K. S. Cheng , J. Takata , Y. Yatsu , C. C. Cheung , D. Donato , L. C. C. Lin , J. Kataoka , Y. Takahashi , K. Maeda , C. Y. Hui , P. H. T. Tam

If the gamma-ray excess towards the inner Galaxy (GCE) detected in Fermi-LAT data is due to millisecond pulsars (MSPs), one expects an associated gravitational wave (GW) signal, whose intensity exceeds the disk MSP population emission by an…

High Energy Astrophysical Phenomena · Physics 2019-03-06 Francesca Calore , Tania Regimbau , Pasquale Dario Serpico

Over the last few years, the data obtained using the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope has provided new insights on high-energy processes in globular clusters, particularly those involving compact objects…

High Energy Astrophysical Phenomena · Physics 2017-02-22 P. H. Thomas Tam , C. Y. Hui , Albert K H. Kong

Millisecond pulsars have been discussed as a possible source of the gamma-ray excess observed from the region surrounding the Galactic Center. With this in mind, we use the observed population of bright low-mass X-ray binaries to estimate…

High Energy Astrophysical Phenomena · Physics 2016-03-01 Ilias Cholis , Dan Hooper , Tim Linden

Observations with the Fermi Gamma-Ray Space Telescope reveal an excess of extended gamma-ray emission likely caused by an undiscovered population of millisecond pulsars (MSPs) in the core of the Sagittarius dwarf spheroidal galaxy (Sgr…

High Energy Astrophysical Phenomena · Physics 2024-10-24 Lucia Gebauer-Werner , Oscar Macias , Christoph Weniger

Radio timing observations of millisecond pulsars (MSPs) in support of Fermi LAT observations of the gamma-ray sky enhance the sensitivity of high-energy pulsation searches. With contemporaneous ephemerides we have detected gamma-ray…

High Energy Astrophysical Phenomena · Physics 2019-08-15 Lucas Guillemot , Ismaël Cognard , Tyrel J. Johnson , Christo Venter , Alice K. Harding

Observations of millisecond pulsars (MSPs) at low radio frequencies play an important role in understanding the Galactic pulsar population and characterising both their emission properties and the effects of the ionised interstellar medium…

High Energy Astrophysical Phenomena · Physics 2025-08-15 C. P. Lee , N. D. R. Bhat , B. W. Meyers , S. J. McSweeney , W. van Straten , C. M. Tan , M. Xue , N. A. Swainston , S. M. Ord , G. Sleap , S. E. Tremblay , A. Williams

The Large Area Telescope (LAT), Fermi's main instrument, is providing a new view of the local energetic pulsar population. In addition to identifying a pulsar origin of a large fraction of the bright unidentified Galactic EGRET sources, the…

High Energy Astrophysical Phenomena · Physics 2009-12-22 G. A. Caliandro , E. C. Ferrara , D. Parent , R. W. Romani

The Galactic Center Excess (GCE) is an extended gamma-ray source in the central region of the Galaxy found in Fermi Large Area Telescope data. In recent years it has become apparent that the GCE may not be spherically symmetric, but may be…

High Energy Astrophysical Phenomena · Physics 2021-09-20 Harrison Ploeg

The Fermi Gamma-Ray Space Telescope has provided evidence for diffuse gamma-ray emission in the central parts of the Milky Way and the Andromeda galaxy. This excess has been interpreted either as dark matter annihilation emission or as…

High Energy Astrophysical Phenomena · Physics 2019-01-30 Giacomo Fragione , Fabio Antonini , Oleg Y. Gnedin

The Fermi-LAT data appear to have an excess of gamma rays from the inner 150 pc of the Galactic Center. The main explanations proposed for this are: an unresolved population of millisecond pulsars (MSPs), dark matter (DM) annihilation, and…

High Energy Astrophysical Phenomena · Physics 2014-03-19 Oscar Macias , Chris Gordon

Gamma rays from young pulsars and milli-second pulsars are expected to contribute to the diffuse gamma-ray emission measured by the {\it Fermi} Large Area Telescope (LAT) at high latitudes. We derive the contribution of the pulsars…

High Energy Astrophysical Phenomena · Physics 2014-12-17 Francesca Calore , Mattia Di Mauro , Fiorenza Donato