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pro vyhledávání: '"gamma-ray excess"'
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 $\langle L_{\gamma}\ra
Externí odkaz:
http://arxiv.org/abs/2412.05220
Autor:
Holst, Ian, Hooper, Dan
It has been suggested that the Galactic Center Gamma-Ray Excess (GCE) could be produced by a large number of centrally-located millisecond pulsars. The fact that no such pulsar population has been detected implies that these sources must be very fain
Externí odkaz:
http://arxiv.org/abs/2403.00978
Publikováno v:
Journal of Cosmology and Astroparticle Physics, 2024(07):066, jul 2024
The two most favored explanations of the Fermi Galactic Center gamma-ray excess (GCE) are millisecond pulsars and self annihilation of the smooth dark matter halo of the galaxy. In order to distinguish between these possibilities, we would like to op
Externí odkaz:
http://arxiv.org/abs/2402.04549
Autor:
Song, Deheng, Eckner, Christopher, Gordon, Chris, Calore, Francesca, Macias, Oscar, Abazajian, Kevork N., Horiuchi, Shunsaku, Kaplinghat, Manoj, Pohl, Martin
Publikováno v:
2024MNRAS.530.4395S
The gamma-ray Fermi-LAT Galactic centre excess (GCE) has puzzled scientists for over 15 years. Despite ongoing debates about its properties, and especially its spatial distribution, its nature remains elusive. We scrutinize how the estimated spatial
Externí odkaz:
http://arxiv.org/abs/2402.05449
Two unresolved questions at galaxy centers, namely the formation of the nuclear star cluster (NSC) and the origin of the gamma-ray excess in the Milky Way (MW) and Andromeda (M31), are both related to the formation and evolution of globular clusters
Externí odkaz:
http://arxiv.org/abs/2311.17071
The f\'eeton is the gauge boson of the $U(1)_{B-L}$ gauge theory. If the gauge coupling constant is extremely small, it becomes a candidate for dark matter. We show that its decay to a pair of electron and positron explains the observed Galactic 511-
Externí odkaz:
http://arxiv.org/abs/2310.05420
Akademický článek
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Akademický článek
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Autor:
Manzoor, Aaqib, Sahayanathan, Sunder, Shah, Zahir, Bhattacharyya, Subir, Iqbal, Naseer, Malik, Zahoor
The availability of simultaneous X-ray and Very High Energy (VHE) observations of blazars helps to identify the plausible radiative contributors to the VHE emission. Under leptonic scenario, the VHE emission from BL Lacs are attributed to the synchro
Externí odkaz:
http://arxiv.org/abs/2308.09470
The GeV-scale gamma-ray excess observed from the region surrounding the Galactic Center has been interpreted as either the products of annihilating dark matter particles, or as the emission from a large population of faint and centrally-located milli
Externí odkaz:
http://arxiv.org/abs/2212.08080