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Title: Diffuse ultrahigh-energy gamma-ray emission from TeV halos

Journal Article · · Physical Review. D.
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]
  1. Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)
  2. Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
  3. Univ. of Chicago, IL (United States)
  4. Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
+ Show Author Affiliations

The LHAASO Collaboration has recently reported a measurement of the diffuse gamma-ray emission from the Galactic Plane at energies between 10 TeV and 1 PeV. While this emission is brighter than that expected from cosmic-ray interactions in the interstellar medium alone, we show that the intensity, spectrum, and morphology of this excess are in good agreement with that predicted from the “TeV halos” which surround the Milky Way’s pulsar population. Here, these results support the conclusion that TeV halos dominate the ultrahigh-energy sky, and that these objects convert ~5% of their total spindown power into very high and ultrahigh-energy photons.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1984947
Report Number(s):
FERMILAB-PUB--23-272-T; arXiv:2306.00051; oai:inspirehep.net:2664573
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 8 Vol. 109; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (42)

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Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC journal January 2020
First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies journal April 2021
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Unresolved Sources Naturally Contribute to PeV Gamma-Ray Diffuse Emission Observed by Tibet ASγ journal March 2022
Galactic Diffuse γ-Ray Emission from GeV to PeV Energies in Light of Up-to-date Cosmic-Ray Measurements journal October 2023
The First LHAASO Catalog of Gamma-Ray Sources journal February 2024
Evidence that Ultra-high-energy Gamma Rays Are a Universal Feature near Powerful Pulsars journal April 2021

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