Predictions of Gamma-ray Emission from Globular Cluster Millisecond Pulsars Above 100 MeV

Abstract

The recent Fermi detection of the globular cluster (GC) 47 Tucanae highlighted the importance of modeling collective gamma-ray emission of millisecond pulsars (MSPs) in GCs. Steady flux from such populations is also expected in the very high energy (VHE) domain covered by ground-based Cherenkov telescopes. We present pulsed curvature radiation (CR) as well as unpulsed inverse Compton (IC) calculations for an ensemble of MSPs in the GCs 47 Tucanae and Terzan 5. We demonstrate that the CR from these GCs should be easily detectable for Fermi, while constraints on the total number of MSPs and the nebular B-field may be derived using the IC flux components.

12 pages, 2 figures, accepted for publication in ApJL

References in corpus (9)

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• Dynamical Formation of Close Binaries in Globular Clusters II: Cataclysmic Variables
• Faint X-ray Sources in the Globular Cluster Terzan 5
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• Pulsars in Globular Clusters
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Cited by in corpus (43)

• Incremental Fermi Large Area Telescope Fourth Source Catalog
• Science with e-ASTROGAM (A space mission for MeV-GeV gamma-ray astrophysics)
• Probing millisecond pulsar emission geometry using light curves from the Fermi Large Area Telescope
• Fermi Discovery of Gamma-ray Emission from the Globular Cluster Terzan 5
• The Gamma-Ray Pulsar Population of Globular Clusters: Implications for the GeV Excess
• GRMHD simulations of neutron-star mergers with weak interactions: r-process nucleosynthesis and electromagnetic signatures of dynamical ejecta
• Very-high-energy gamma-ray emission from the direction of the Galactic globular cluster Terzan 5
• Low Mass X-Ray Binaries in the Inner Galaxy: Implications for Millisecond Pulsars and the GeV Excess
• Testing the millisecond pulsar scenario of the Galactic center gamma-ray excess with very high energy gamma-rays
• TeV Gamma-ray Astronomy: A Summary
• A Highly Eccentric 3.9-Millisecond Binary Pulsar in the Globular Cluster NGC 6652
• The Origin of Gamma-Rays from Globular Clusters
• Prospects for Observations of Pulsars and Pulsar Wind Nebulae with CTA
• The Fundamental Plane of Gamma-ray Globular Clusters
• The Effect of Diffusion on the Particle Spectra in Pulsar Wind Nebulae
• Evidence for a high-energy tail in the gamma-ray spectra of globular clusters
• H.E.S.S. upper limit on the very high energy gamma-ray emission from the globular cluster 47 Tucanae
• Chandra detection of diffuse X-ray emission from the globular cluster Terzan 5
• Search for pulsed gamma-ray emission from globular cluster M28
• Gamma-rays from millisecond pulsar population within the central stellar cluster in the Galactic Center
• TeV cosmic ray electrons from millisecond pulsars
• MeerKAT discovery of 13 new pulsars in Omega Centauri
• Multi-wavelength environment of the Galactic globular cluster Terzan 5
• Search for VHE $\gamma$-ray emission from the globular cluster M13 with the MAGIC telescope
• Prospects for a Dark Matter annihilation signal towards the Sagittarius dwarf galaxy with ground based Cherenkov telescopes
• Search for Very-high-energy γ-ray emission from Galactic globular clusters with H.E.S.S
• TeV gamma-ray emission initiated by the population or individual millisecond pulsars within globular clusters
• Gamma-ray emission from globular clusters
• Finding short GRB remnants in globular clusters: the VHE gamma-ray source in Terzan 5
• Misaligned TeV gamma-ray sources in the vicinity of globular clusters
• Deep observations of the globular cluster M15 with the MAGIC telescopes
• A Search for Diffuse X-ray Emission from GeV Detected Galactic Globular Clusters
• High energy gamma-ray emission from compact galactic sources in the context of observations with the next generation Cherenkov Telescope Arrays
• Numerical modelling of gamma-ray emission produced by electrons originating from the magnetospheres of millisecond pulsars in globular clusters
• Gamma-rays from electrons accelerated by rotating magnetized White Dwarfs in Globular Clusters
• Identifying the brightest Galactic globular clusters for future observations by H.E.S.S. and CTA
• Probing the pulsar population of Terzan 5 via spectral modeling
• How the dynamical properties of globular clusters impact their $\gamma$-ray and X-ray emission
• Gamma-rays from millisecond pulsars in Globular Clusters
• Assessing Uncertainties in the Predicted Very-High-Energy Flux of Globular Clusters in the Cherenkov Telescope Array Era
• A possible GeV-TeV connection in the direction of the Globular Cluster UKS 1
• Characterizing the Gamma-ray Emission Properties of the Globular Cluster M5 with the Fermi-LAT
• MAGIC observation of Globular Cluster M13 and its millisecond pulsars