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Author  |
Amerio, A.; Hooper, D.; Linden, T. |
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Title |
Millisecond pulsars in globular clusters and implications for the galactic center gamma-ray excess |
Type |
Journal Article |
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Year |
2025 |
Publication |
Journal of Cosmology and Astroparticle Physics |
Abbreviated Journal |
J. Cosmol. Astropart. Phys. |
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Volume |
10 |
Issue |
10 |
Pages |
106 - 34pp |
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Keywords |
millisecond pulsars; dark matter theory; gamma ray theory |
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Abstract |
We study the gamma-ray emission from millisecond pulsars within the Milky Way's globular cluster system in order to measure the luminosity function of this source population. We find that these pulsars have a mean luminosity of (L gamma) ti (1-8) x 1033 erg/s (integrated between 0.1 and 100 GeV) and a log-normal width of sigma L ti 1.4-2.8. If the Galactic Center Gamma-Ray Excess were produced by pulsars with similar characteristics, Fermi would have already detected N ti 17-37 of these sources, whereas only three such pulsar candidates have been identified. We conclude that the excess gamma-ray emission can originate from pulsars only if they are significantly less bright, on average, than those observed within globular clusters or in the Galactic Plane. This poses a serious challenge for pulsar interpretations of the Galactic Center Gamma-Ray Excess. |
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Address |
[Amerio, Aurelio] Univ Valencia, Inst Fis Corpuscular IFIC, Calle Catedrat Jose Beltran 2, Paterna 46980, Spain, Email: aurelio.amerio@ific.uv.es; |
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Publisher |
IOP Publishing Ltd |
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Language |
English |
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Original Title |
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Series Volume |
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ISSN |
1475-7516 |
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Notes |
WOS:001606471100002 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6919 |
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