Warm dark matter (WDM) can potentially explain small-scale observations that currently challenge the cold (CDM) model, as warm particles suppress structure formation due to free-streaming effects. Observing distribution provides a valuable way distinguish between CDM and WDM. In this work, we use from Dark Energy Survey PanSTARRS1, which observe 270 Milky-Way satellites after completeness corrections. We test WDM models by comparing number of in Milky Way with predictions derived...

We apply the recently developed analysis of 16 years INTEGRAL/SPI data including a dark matter spatial template to derive bounds on candidates lighter than WIMPs (like sterile neutrinos or axion-like particles) decaying into line continuum electromagnetic final state channels. The obtained are strongest date for masses between $\sim $60 keV and $\sim$16 MeV experiencing two-body decays producing photon lines.

The LHAASO Collaboration has recently reported a measurement of the diffuse gamma-ray emission from Galactic Plane at energies between 10 TeV and 1 PeV. While this is brighter than that expected cosmic-ray interactions in interstellar medium alone, we show intensity, spectrum, morphology excess are good agreement with predicted ``TeV halos'' which surround Milky Way's pulsar population. These results support conclusion halos dominate ultrahigh-energy sky, these objects convert...

Dark matter might be made of ``warm'' particles, such as sterile neutrinos in the keV mass range, which can decay into photons through mixing and are consequently detectable by x-ray telescopes. Axionlike particles (ALPs) telescopes, too, when coupled to standard model range. Both could explain unidentified 3.5 line, and, interestingly, XENON1T observed an excess electron recoil events most prominent at 2--3 keV. One explanation ALPs origin, is not yet excluded constraints anomaly free...

We report the detection of pulsed signal radio-quiet magnetar-like pulsar PSR J1846-0258 in high-energy \gr-ray data Fermi Large Area Telescope (Fermi LAT). produced phase-coherent timing models exploiting RXTE PCA and Swift XRT monitoring for post- (magnetar-like) outburst period from 2007 August 28 to 2016 September 4, with independent verification using INTEGRAL ISGRI GBM data. Phase-folding barycentric arrival times selected LAT events J1846-0258, resulted a 4.2 sigma (30--100 MeV) broad...

Astrophysical neutrino events have been measured in the last couple of years, which show an isotropic distribution, and current discussion is their astrophysical origin. We use both anisotropic components diffuse data to constrain contribution a broad number extra-galactic source populations observed sky. simulate up-going muon by applying statistical distributions for flux extragalactic sources, Monte Carlo method we exploit simulation future IceCube, IceCube-Gen2 KM3NeT exposures. aim at...

Warm dark matter has been strongly constrained in recent years as the sole component of matter. However, a less-explored alternative is that consists mixture warm and cold (MWDM). In this work, we use observations Milky Way satellite galaxies to constrain MWDM scenarios where formation small-scale structure suppressed either by generic thermal relic or sterile neutrino produced through Shi-Fuller mechanism. To achieve this, model combining numerical simulations with semi-analytical models...

The hypothesis of two different components in the high-energy neutrino flux observed with IceCube has been proposed to solve tension among data-sets and account for an excess events at 100 TeV. In addition a standard astrophysical power-law component, second component might be explained by class sources, or more intriguingly, originate from decaying annihilating dark matter. These scenarios can distinguished thanks expected angular distributions events. Neutrino signals matter are indeed...

Experimental developments in neutrino telescopes are drastically improving their ability to constrain the annihilation cross-section of dark matter. In this paper, we employ an angular power spectrum analysis method probe galactic and extra-galactic matter signals with telescopes. We first derive projections for a next generation telescope that is inspired by KM3NeT. emphasise such much less sensitive choice density profile. Remarkably, projected sensitivity improved more than order...

We apply the recently developed analysis of 16 years INTEGRAL/SPI data including a dark matter spatial template to derive bounds on candidates lighter than WIMPs (like sterile neutrinos or axion-like particles) decaying into line continuum electromagnetic final state channels. The obtained are strongest date for masses between $\sim $60 keV and $\sim$16 MeV experiencing two-body decays producing photon lines.

Although the standard $\Lambda$+Cold Dark Matter ($\Lambda$CDM) model is well tested on large scales, primordial power spectrum may deviate from $\Lambda$CDM small scales due to specific dark matter properties or alternative inflationary models. These deviations affect formation of structure, which subsequently leads different observable galaxies. In this work, we study impact a blue and red tilted central density dwarf To do this, densities galaxies using combination high-resolution...

The discovery of high-energy astrophysical neutrinos by IceCube has opened a new window to the Universe. However, origin these is still mystery, and some them could be result dark matter interactions such as decay. Next generation gigaton water-Cherenkov neutrino telescope, KM3NeT, expected offer significantly improved energy resolution in cascade channel, advantageous viewing condition Galactic Center; both important for searches decay signals. We study sensitivity KM3NeT on decays...

Warm dark matter (WDM) can potentially explain small-scale observations that currently challenge the cold (CDM) model, as warm particles suppress structure formation due to free-streaming effects. Observing distribution provides a valuable way distinguish between CDM and WDM. In this work, we use from Dark Energy Survey PanSTARRS1, which observe 270 Milky-Way satellites after completeness corrections. We test WDM models by comparing number of in Milky Way with predictions derived...

Experimental developments in neutrino telescopes are drastically improving their ability to constrain the annihilation cross-section of dark matter. Focusing on particle models for matter, we assess how these future limits will complement existing landscape matter searches. We bring together results from gamma-ray telescopes, measurements cosmic microwave background and direct detection. Our projections based Angular Power Spectrum method, which is a powerful tool reducing astrophysical...

The nature of dark matter remains an open question and could be in the form warm matter. Sterile neutrinos axion-like particles are well motivated candidates, can decay into photons, which consequently detectable by X-ray telescopes with keV mass. Both explain observed unidentified 3.5 line and, interestingly, XENON1T excess at a few that originate from particles. We study diffuse emission coming Galactic halo, test sensitivity all-sky survey eROSITA to identify sterile neutrino or particle....

The LHAASO Collaboration has recently reported a measurement of the diffuse gamma-ray emission from Galactic Plane at energies between 10 TeV and 1 PeV. While this is brighter than that expected cosmic-ray interactions in interstellar medium alone, we show intensity, spectrum, morphology excess are good agreement with predicted "TeV halos" which surround Milky Way's pulsar population. These results support conclusion halos dominate ultra-high-energy sky, these objects convert $\sim 5\%$...

Abstract To constrain the contribution of source populations to observed neutrino sky, we consider isotropic and anisotropic components diffuse data. We simulate through-going muon events by applying statistical distributions for fluxes extragalactic sources investigate sensitivities current (IceCube) future (IceCube-Gen2 KM3NeT) experiments. The angular power spectrum is a powerful probe assess characteristics data can already rare bright with IceCube In addition, decaying annihilating very...