Št. zadetkov: 50
Objavljeni znanstveni prispevek na konferenci
Oznake:
galaxy clusters;dark matter;gamma-ray diffuse emission;cosmic rays;
Galaxy clusters are the largest structures in the Universe, being dark matter (DM) dominated objects. For DM decay, they yield the highest expected fluxes with respect to other prime targets. ForDMannihilation, clusters can provide fluxes comparable to dwarf spheroidal galaxies, as long as the contr ...
Leto:
2025
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
cosmology;f(R) models;alternative gravity theories;
In this paper we present cosmological constraints on several well-known models, but also on a new class of models that are variants of the Hu-Sawicki one of the form , that interpolate between the cosmological constant model and a matter dominated universe for different values of the parameter ...
Leto:
2018
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
dark matter;cosmic rays;astroparticles;gamma-ray astronomy;particle astrophysics;particle dark matter;
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 mode ...
Leto:
2022
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Objavljeni znanstveni prispevek na konferenci
Oznake:
dark matter;subhalos;unidentified gamma-ray sources;gamma-rays;
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 actual sensitivity of the Fermi-LAT to extended subhalos using simulated data based on a realistic ...
Leto:
2022
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
dark matter theory;dwarf galaxies;galaxy clusters;gamma-ray theory;
Gamma-ray observations have long been used to constrain the properties of dark matter (DM), with a strong focus on weakly interacting massive particles annihilating through velocity-independent processes. However, in the absence of clear-cut observational evidence for the simplest candidates, the in ...
Leto:
2022
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Objavljeni znanstveni prispevek na konferenci
Oznake:
gamma-rays;dark matter;astrophysical targets;velocity-dependent annihilation;substructures;
Indirect searches with gamma rays set strong constraints on the properties of self-annihilating dark matter particle candidates. Observations of dwarf galaxies and galaxy clusters are especially interesting. Here we revisit the calculation of the annihilation flux by considering a velocity-dependent ...
Leto:
2022
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
dark matter;subhalo boost;sommerfeld enhancement;velocity-dependent annihilation;gamma-rays;
Abstract
As searches for thermal and self-annihilating dark matter (DM) intensify, it becomes
crucial to include as many relevant physical processes and ingredients as possible to refine
signal predictions, in particular those which directly relate to the intimate propertie ...
Leto:
2023
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Izvirni znanstveni članek
Oznake:
dark matter;gamma-ray astronomy;galaxies;astronomical masses;mass distributions;
We analyze 11 years of Fermi-Large Area Telescope (LAT) data corresponding to the sky regions of seven dwarf irregular (dIrr) galaxies. DIrrs are dark matter (DM)-dominated systems, proposed as interesting targets for the indirect search of DM with gamma rays. The galaxies represent interesting case ...
Leto:
2021
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Objavljeni znanstveni prispevek na konferenci
Oznake:
active galactic nuclei;radio-loud AGN;blazars;
The TeV extragalactic sky is dominated by blazars, radio-loud active galactic nuclei with a
relativistic jet pointing towards the Earth. Blazars show variability that can be quite exceptional
both in terms of flux (orders of magnitude of brightening) and time (down to the minute timescale).
This ...
Leto:
2023
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)
Objavljeni znanstveni prispevek na konferenci
Oznake:
Cherenkov Telescope Array;CTA;very-high-energy gamma-ray astroparticle physics;instrument response functions;machine learning;
The Cherenkov Telescope Array (CTA) will be the next-generation observatory in the field of very-high-energy (20 GeV to 300 TeV) gamma-ray astroparticle physics. The traditional approach to data analysis in this field is to apply quality cuts, optimized using Monte Carlo simulations, on the data acq ...
Leto:
2023
Vir:
Repozitorij Univerze v Novi Gorici (RUNG)