TeV gamma rays from Galactic Center pulsars
Abstract
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.
- Authors:
-
[1];
[2];
[3]
- 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)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1367901
- Alternate Identifier(s):
- OSTI ID: 1567978
- Report Number(s):
- FERMILAB-PUB-17-173-A; arXiv:1705.09293
Journal ID: ISSN 2212-6864; 1601359
- Grant/Contract Number:
- AC02-07CH11359; FG02-13ER41958; NNX15AB18G; PHY-1404311; SC0009924
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of the Dark Universe
- Additional Journal Information:
- Journal Volume: 21; Journal Issue: C; Journal ID: ISSN 2212-6864
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Hooper, Dan, Cholis, Ilias, and Linden, Tim. TeV gamma rays from Galactic Center pulsars. United States: N. p., 2018.
Web. doi:10.1016/j.dark.2018.05.004.
Hooper, Dan, Cholis, Ilias, & Linden, Tim. TeV gamma rays from Galactic Center pulsars. United States. https://doi.org/10.1016/j.dark.2018.05.004
Hooper, Dan, Cholis, Ilias, and Linden, Tim. Mon .
"TeV gamma rays from Galactic Center pulsars". United States. https://doi.org/10.1016/j.dark.2018.05.004. https://www.osti.gov/servlets/purl/1367901.
@article{osti_1367901,
title = {TeV gamma rays from Galactic Center pulsars},
author = {Hooper, Dan and Cholis, Ilias and Linden, Tim},
abstractNote = {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.},
doi = {10.1016/j.dark.2018.05.004},
journal = {Physics of the Dark Universe},
number = C,
volume = 21,
place = {United States},
year = {Mon Jun 04 00:00:00 EDT 2018},
month = {Mon Jun 04 00:00:00 EDT 2018}
}
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Figures / Tables:
Figure 1: The gamma-ray spectrum from the inverse-Compton scattering of very high-energy electrons and positrons in the region surrounding the Galactic Center. In the left frame, we show the spectrum of the central point source as reported by the HESS Collaboration, which is compared to that predicted in an environmentmore »
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.