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Naslov:Spatial extension of dark subhalos as seen by Fermi-LAT and the implications for WIMP constraints
Avtorji:ID Coronado-Blázquez, Javier, IFT UAM-CSIC (Avtor)
ID Sánchez-Conde, Miguel, IFT UAM-CSIC (Avtor)
ID Pérez Romero, Judit, IFT UAM-CSIC (Avtor)
ID Aguirre-Santaella, Alejandra, IFT UAM-CSIC (Avtor)
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Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Spatial extension has been hailed as a “smoking gun” in the gamma-ray search of dark galactic subhalos, which would appear as unidentified sources for gamma-ray telescopes. In this work, we study the sensitivity of the Fermi-LAT to extended subhalos using simulated data based on a realistic sky model. We simulate spatial templates for a set of representative subhalos, whose parameters were derived from our previous work with N-body cosmological simulation data. We find that detecting an extended subhalo and finding an unequivocal signal of angular extension requires, respectively, a flux 2 to 10 times larger than in the case of a pointlike source. By studying a large grid of models, where parameters such as the WIMP mass, annihilation channel, or subhalo model are varied significantly, we obtain the response of the LAT as a function of the product of annihilation cross-section times the J-factor. Indeed, we show that spatial extension can be used as an additional “filter” to reject subhalos candidates among the pool of unidentified LAT sources, as well as a smoking gun for positive identification. For instance, typical angular extensions of a few tenths of a degree are expected for the considered scenarios. Finally, we also study the impact of the obtained LAT sensitivity to such extended subhalos on the achievable dark matter constraints, which are a few times less constraining than comparable point-source limits.
Ključne besede:dark matter, cosmic rays and astroparticles, gamma-ray astronomy, particle astrophysics, particle dark matter
Verzija publikacije:Objavljena publikacija
Leto izida:2022
Št. strani:22
Številčenje:8, 105
PID:20.500.12556/RUNG-7899 Novo okno
COBISS.SI-ID:139643907 Novo okno
DOI:10.1103/PhysRevD.105.083006 Novo okno
NUK URN:URN:SI:UNG:REP:SEYAJJTK
Datum objave v RUNG:26.01.2023
Število ogledov:3171
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
CORONADO-BLÁZQUEZ, Javier, SÁNCHEZ-CONDE, Miguel, PÉREZ ROMERO, Judit in AGUIRRE-SANTAELLA, Alejandra, 2022, Spatial extension of dark subhalos as seen by Fermi-LAT and the implications for WIMP constraints. Physical Review D [na spletu]. 2022. Vol. 8, no. 105. [Dostopano 7 april 2025]. DOI 10.1103/PhysRevD.105.083006. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=7899
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Gradivo je del revije

Naslov:Physical Review D
Skrajšan naslov:PRD
Leto izida:2022

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