Gamma-rays from electrons accelerated by rotating magnetized White Dwarfs in Globular Clusters

Abstract

Recently a substantial part of globular cluster population has been established as GeV gamma-ray sources by the Fermi-LAT telescope. We investigate possible production of the high energy gamma-rays by relativistic electrons injected from the population of fast rotating, magnetized White Dwarfs within the globular cluster. These electrons comptonize the radiation field within the globular cluster. We conclude that gamma-rays produced by electrons accelerated by the whole population of White Dwarfs within a specific cluster are on the level of detectability of the future Cherenkov telescope array provided that a few thousand of magnetized White Dwarfs have been created uniformly during the lifetime of the globular cluster.

22 pages, 7 figures, accepted to Journal of Physics G

References in corpus (10)

• Design Concepts for the Cherenkov Telescope Array
• A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope
• Fermi Detection of a Luminous Gamma-ray Pulsar in a Globular Cluster
• Dynamical Formation of Millisecond Pulsars in Globular Clusters
• White Dwarf Pulsars as Possible Cosmic Ray Electron-Positron Factories
• Discovery of new gamma-ray pulsars with AGILE
• Fermi Discovery of Gamma-ray Emission from the Globular Cluster Terzan 5
• Gamma-ray emission from the globular clusters Liller 1, M80, NGC 6139, NGC 6541, NGC 6624, and NGC 6752
• H.E.S.S. observations of the globular clusters NGC 6388 and M 15 and search for a Dark Matter signal
• The Origin of Gamma-Rays from Globular Clusters

Cited by in corpus (9)

• TeV gamma-ray emission initiated by the population or individual millisecond pulsars within globular clusters
• Gamma-ray emission from globular clusters
• Misaligned TeV gamma-ray sources in the vicinity of globular clusters
• Deep observations of the globular cluster M15 with the MAGIC telescopes
• Numerical modelling of gamma-ray emission produced by electrons originating from the magnetospheres of millisecond pulsars in globular clusters
• High energy gamma-ray emission from compact galactic sources in the context of observations with the next generation Cherenkov Telescope Arrays
• Probing the pulsar population of Terzan 5 via spectral modeling
• Hadronic model for the non-thermal radiation from the binary system AR~Scorpii
• Assessing Uncertainties in the Predicted Very-High-Energy Flux of Globular Clusters in the Cherenkov Telescope Array Era