TeV gamma rays from Galactic Center pulsars

Hooper, Dan; Cholis, Ilias; Linden, Tim

doi:10.1016/j.dark.2018.05.004

Title: TeV gamma rays from Galactic Center pulsars

Journal Article · 03 June 2018 · Physics of the Dark Universe

DOI: https://doi.org/10.1016/j.dark.2018.05.004 · OSTI ID:1367901

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Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Fermilab Center for Particle Astrophysics; Univ. of Chicago, IL (United States). Dept. of Astronomy and Astrophysics, and Kavli Institute for Cosmological Physics
Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Physics and Astronomy
The Ohio State Univ., Columbus, OH (United States). Center for Cosmology and AstroParticle Physics (CCAPP)

Measurements of the nearby pulsars Geminga and B0656+14 by the HAWC and Milagro telescopes have revealed the presence of bright TeV-emitting halos surrounding these objects. If young and middle-aged pulsars near the Galactic Center transfer a similar fraction of their energy into TeV photons, then these sources could plausibly dominate the emission that is observed by HESS and other ground-based telescopes from the innermost $$\sim$$$$10^2$ parsecs of the Milky Way. In particular, both the spectral shape and the angular extent of this emission is consistent with TeV halos produced by a population of pulsars, although the reported correlation of this emission with the distribution of molecular gas suggests that diffuse hadronic processes also must contribute. The overall flux of this emission requires a birth rate of ~100-1000 neutron stars per Myr near the Galactic Center, in good agreement with recent estimates.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: AC02-07CH11359; SC0009924

OSTI ID:: 1367901

Report Number(s):: FERMILAB-PUB--17-173-A; arXiv:1705.09293; 1601359

Journal Information:: Physics of the Dark Universe, Journal Name: Physics of the Dark Universe Journal Issue: C Vol. 21; ISSN 2212-6864

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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