Results 41 to 50 of about 811 (178)

The Giant Radio Array for Neutrino Detection (GRAND) Project

SciPost Physics Proceedings, 2022
GRAND is designed to detect ultra-high-energy cosmic particles -- specially neutrinos, cosmic rays and gamma rays using radio antennas. With $\sim$20 mountainous sites around the world it will cover a total area of 200,000 km$^{2}$.
Bruno Lazarotto Lago
doaj   +1 more source

Whipped and Mixed Warm Clouds in the Deep Sea

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Turbulence is indispensable to redistribute nutrients for all life forms larger than microbial, on land and in the ocean. Yet, the development of deep‐sea turbulence was not studied in three dimensions to date. As a disproportionate laboratory, an array of nearly 3,000 high‐resolution temperature sensors had been installed for three years on ...
Hans van Haren, KM3NeT collaboration
wiley   +1 more source

Testing the Weak Cosmic Censorship Conjecture via Test Particle–Induced Overcharging/Overspinning of Kerr–Newman–Modified Gravity Black Hole

Advances in Astronomy, Volume 2026, Issue 1, 2026.
We examine the weak cosmic censorship conjecture (WCCC) violation by throwing a charged and rotating test particle into a Kerr–Newman–modified gravity black hole (KN–MOG BH). The result depends on several factors, such as the relative sign of the particle’s charge and its direction of rotation with respect to black hole (BH).
Waqar Ahmad, Abdul Rehman Kashif, Jose Gaite   +2 more
wiley   +1 more source

Spectral Analysis of Flickering Gamma‐Ray Flashes Observed During the ALOFT 2023 Campaign

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 23, 16 December 2025.
Abstract We examine a newly discovered category of high‐energy radiation events called flickering gamma‐ray flashes (FGF) detected during the airborne lightning observatory for FEGS and TGFs campaign in July 2023. These FGFs are characterized by highly pulsating gamma‐ray emissions that have no detectable concurrent optical or radio signals (Ostgaard ...
D. Sarria, N. Østgaard, I. Bjørge‐Engeland, A. Mezentsev, M. Marisaldi, N. Lehtinen, M. Stanley, T. Lang, C. Schultz, A. Fuglestad   +9 more
wiley   +1 more source

Quantification of Perturbation to the Daytime Lower Ionosphere From a Gamma Ray Burst Using ELF Remote Sensing

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract On 9 October 2022, a powerful gamma ray burst (GRB), GRB221009A, caused significant changes in the electron density of the lower ionosphere, as evidenced by VLF (3–30 kHz) radio wave observations. However, GRB221009A did not yield any observable signatures at the Schumann resonances (∼8, ∼14 Hz), which are also sensitive to the lower ...
M. Gołkowski, Z. Nieckarz, J. Mlynarczyk, M. Ostrowski, J. Kubisz, A. Michalec, J. Lichtenberger, A. Klekociuk, P. Nicholson   +8 more
wiley   +1 more source

Cosmic Ray Counting Variability From Water‐Cherenkov Detectors as a Proxy of Stratospheric Conditions in Antarctica

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract This work examines atmospheric effects on cosmic ray counts observed by a Water‐Cherenkov detector at the Argentine Antarctic Marambio Station. We analyze the influence of ground‐level barometric pressure and geopotential height at various pressure levels on daily particle rates, finding the strongest association at 100 hPa, linked to ...
N. A. Santos, N. Gómez, S. Dasso, A. M. Gulisano, L. Rubinstein, M. Pereira, O. Areso, for the LAGO Collaboration   +7 more
wiley   +1 more source

Cosmic Bulk Flow Analysis in Modified Gravity Theories: f(R) and Perturbed f(R) Models with Neutrino Coupling

The Astronomical Journal
In this study, we explore the characteristics of bulk flow across various redshift ranges within the frameworks of f ( R ) gravity, perturbed f ( R ) gravity, and perturbed f ( R ) gravity coupled with neutrinos.
Muhammad Yarahmadi, Amin Salehi
doaj   +1 more source

Neutrinos and Gamma Rays from Galaxy Clusters Constrained by the Upper Limits of IceCube

The Astrophysical Journal
Clusters of galaxies possess the capability to accelerate cosmic rays (CRs) to very high energy up to ∼10 ^18 eV due to their large size and magnetic field strength, which favor CR confinement for cosmological times.
Saqib Hussain, Elisabete M. de Gouveia Dal Pino, Giulia Pagliaroli   +2 more
doaj   +1 more source

On the High-Energy Neutrino Emission from Active Galactic Nuclei

Universe, 2018
We review observational aspects of the active galactic nuclei and their jets in connection with the detection of high-energy neutrinos by the Antarctic IceCube Neutrino Observatory.
Emma Kun, Peter L. Biermann, Silke Britzen, László Á. Gergely   +3 more
doaj   +1 more source

Compressibility Function and Speed of Sound in the Non‐Commutative Quantum Hadrodynamics Type‐I Model for Neutron Stars

Astronomische Nachrichten, Volume 346, Issue 7-8, September 2025.
ABSTRACT We investigate the effects of a minimal measurable length on neutron stars, within the quantum hadrodynamics (QHD‐I) model modified by the Generalized Uncertainty Principle (GUP). Working in a deformed Poisson algebra framework, we incorporate GUP effects via a time‐invariant transformation of the phase space volume, effectively reducing the ...
João Gabriel Galli Gimenez, Dimiter Hadjimichef, César A. Zen Vasconcellos   +2 more
wiley   +1 more source