Diffuse gamma-ray emission from galactic pulsars

Abstract

Millisecond Pulsars are second most abundant source population discovered by the Fermi-LAT. They might contribute non-negligibly to the diffuse emission measured at high latitudes by Fermi-LAT, the IDGRB. Gamma-ray sources also contribute to the anisotropy of the IDGRB measured on small scales by Fermi-LAT. We aim to assess the contribution of the unresolved counterpart of the detected MSPs population to the IDGRB and the maximal fraction of the measured anisotropy produced by this source class. We model the MSPs spatial distribution in the Galaxy and the gamma-ray emission parameters by considering radio and gamma-ray observational constraints. By simulating a large number of MSPs populations, we compute the average diffuse emission and the anisotropy 1-sigma upper limit. The emission from unresolved MSPs at 2 GeV, where the peak of the spectrum is located, is at most 0.9% of the measured IDGRB above 10 degrees in latitude. The 1-sigma upper limit on the angular power for unresolved MSP sources turns out to be about a factor of 60 smaller than Fermi-LAT measurements above 30 degrees. Our results indicate that this galactic source class represents a negligible contributor to the high-latitude gamma-ray sky and confirm that most of the intensity and geometrical properties of the measured diffuse emission are imputable to other extragalactic source classes. Nevertheless, given the MSP distribution, we expect them to contribute significantly to the gamma-ray diffuse emission at low latitudes. Since, along the galactic disk, the population of young Pulsars overcomes in number the one of MSPs, we compute the gamma-ray emission from the whole population of unresolved Pulsars in two low-latitude regions: the inner Galaxy and the galactic center.

19 pages, 26 figures. It matches the published version, minor changes only

References in corpus (49)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The ATNF Pulsar Catalogue
• Monitoring stellar orbits around the Massive Black Hole in the Galactic Center
• The ATNF Pulsar Catalogue
• Observations of the Crab Nebula with H.E.S.S
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Birth and Evolution of Isolated Radio Pulsars
• EGRET Observations of the Extragalactic Gamma Ray Emission
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT
• The Cosmic Evolution of Fermi BL Lacertae Objects
• Precision Timing Measurements of PSR J1012+5307
• The Luminosity Function of Fermi-detected Flat-Spectrum Radio Quasars
• The Fermi-LAT high-latitude Survey: Source Count Distributions and the Origin of the Extragalactic Diffuse Background
• The uncertainty in Galactic parameters
• Star-forming galaxies as the origin of diffuse high-energy backgrounds: Gamma-ray and neutrino connections, and implications for starburst history
• Detection of Pulsed Gamma Rays Above 100 GeV from the Crab Pulsar
• The Bar and Spiral Structure Legacy (BeSSeL) Survey: Mapping the Milky Way with VLBI Astrometry
• Revisiting the radial distribution of pulsars in the Galaxy
• Neutron Star Population Dynamics.I: Millisecond Pulsars
• Contribution of the Gamma-ray Loud Radio Galaxies Core Emissions to the Cosmic MeV and GeV Gamma-Ray Background Radiation
• Pulsars Cannot Account for the Inner Galaxy's GeV Excess
• Diffuse $\gamma$-ray emission from misaligned active galactic nuclei
• Restricting UHECRs and cosmogenic neutrinos with Fermi-LAT
• Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT
• Population synthesis of radio and gamma-ray millisecond pulsars from the Galactic disk
• Phase-resolved energy spectra of the Crab Pulsar in the range of 50-400 GeV measured with the MAGIC Telescopes
• Constraints on the Emission Geometries and Spin Evolution of Gamma-ray Millisecond Pulsars
• Gamma rays from clusters of galaxies
• Millisecond pulsar interpretation of the Galactic center gamma-ray excess
• The Pulsar Contribution to the Gamma-Ray Background
• Joint anisotropy and source count constraints on the contribution of blazars to the diffuse gamma-ray background
• Observations of the Crab pulsar between 25 GeV and 100 GeV with the MAGIC I telescope
• Diffuse $\gamma$-ray emission from unresolved BL Lac objects
• The very-high energy emission from pulsars: a case for inverse Compton scattering
• Characterization of Dark-Matter-induced anisotropies in the diffuse gamma-ray background
• The Contribution of Blazars to the Extragalactic Diffuse Gamma-ray Background and Their Future Spatial Resolution
• Conservative Constraints on Dark Matter from the Fermi-LAT Isotropic Diffuse Gamma-Ray Background Spectrum
• Constraining dark matter annihilation with the isotropic $\gamma$-ray background: updated limits and future potential
• Pulsed Gamma-rays from the millisecond pulsar J0030+0451 with the Fermi Large Area Telescope
• Ultra-High Energy Cosmic Rays and the GeV-TeV Diffuse Gamma-Ray Flux
• Anisotropies in the gamma-ray sky from millisecond pulsars
• Dissecting the Gamma-Ray Background in Search of Dark Matter
• Constraining the Galactic millisecond pulsar population using Fermi Large Area Telescope
• High-Energy Emission of the First Millisecond Pulsar
• Gamma-ray anisotropies from dark matter in the Milky Way: the role of the radial distribution

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• Particle Dark Matter Constraints: the Effect of Galactic Uncertainties
• Testing the millisecond pulsar scenario of the Galactic center gamma-ray excess with very high energy gamma-rays
• Tomographic-spectral approach for dark matter detection in the cross-correlation between cosmic shear and diffuse gamma-ray emission
• Active Galactic Nuclei and the Origin of IceCube's Diffuse Neutrino Flux
• A neural simulation-based inference approach for characterizing the Galactic Center $\gamma$-ray excess
• Bayesian Model Comparison and Analysis of the Galactic Disk Population of Gamma-Ray Millisecond Pulsars
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• NPTFit: A code package for Non-Poissonian Template Fitting
• Ruling out $\sim 100-300$ GeV thermal relic annihilating dark matter by radio observation of the Andromeda galaxy
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• Extreme & High Synchrotron Peak Blazars beyond 4FGL: The 2BIGB $\gamma$-ray catalogue
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• Can galactic dark matter substructure contribute to the cosmic gamma-ray anisotropy?
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