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Galactic cosmic rays (CRs) play a crucial role in galaxy formation and evolution by altering gas dynamics and chemistry across multiple scales. Typical numerical simulations of CR transport assume a constant diffusion coefficient for the…

星系天体物理 · 物理学 2025-10-16 Sarah Thiele , Romain Teyssier

We evaluate dark matter (DM) limits from cosmic-ray antiproton observations using the recent precise AMS-02 measurements. We properly take into account cosmic-ray propagation uncertainties fitting at the same time DM and propagation…

高能天体物理现象 · 物理学 2017-05-15 Alessandro Cuoco , Michael Krämer , Michael Korsmeier

Weak gravitational lensing is a powerful probe of cosmology, with second-order shear statistics commonly used to constrain parameters such as the matter density $\Omega_\mathrm{m}$ and the clustering amplitude $S_8$. However, parameter…

宇宙学与河外天体物理 · 物理学 2025-09-26 Niek Wielders , Laila Linke , Pierre A. Burger , Sven Heydenreich , Lucas Porth , Peter Schneider

ALICE is a large experiment at the CERN Large Hadron Collider. Located 52 meters underground, its detectors are suitable to measure muons produced by cosmic-ray interactions in the atmosphere. In this paper, the studies of the cosmic muons…

高能天体物理现象 · 物理学 2025-05-19 ALICE Collaboration

We present ALLSMOG, the APEX Low-redshift Legacy Survey for MOlecular Gas. ALLSMOG is a survey designed to observe the CO(2-1) emission line with the APEX telescope, in a sample of local galaxies (0.01 < z < 0.03), with stellar masses in…

One of the main results of the ATIC (Advanced Thin Ionization Calorimeter) experiment is a collection of energy spectra of abundant cosmic-ray nuclei: protons, He, C, O, Ne, Mg, Si, Fe measured in terms of energy per particle in the energy…

高能天体物理现象 · 物理学 2017-08-01 A. D. Panov , N. V. Sokolskaya , V. I. Zatsepin

In this work, a two-dimensional time-fractional subdiffusion model is developed to investigate the underlying transport phenomena evolving in a binary medium comprised of two sub-domains occupied by homogeneous material. We utilise an…

数值分析 · 数学 2021-02-05 Libo Feng , Ian Turner , Patrick Perre , Kevin Burrage

We introduce a new technique to constrain the line-of-sight integrated electron density of our Galactic halo $\text{DM}_\text{MW,halo}$ through analysis of the observed dispersion measure distributions of pulsars $\text{DM}_\text{pulsar}$…

星系天体物理 · 物理学 2020-06-09 E. Platts , J. Xavier Prochaska , Casey J. Law

The measurement of the isotopic composition of cosmic rays (CRs) provides essential insights the understanding of the origin and propagation of these particles, namely the CR source spectra, the propagation processes and the galactic halo…

天体物理仪器与方法 · 物理学 2022-11-30 E. F. Bueno , F. Barão , M. Vecchi

The spectral data on the diffuse Galactic gamma-rays, at medium and high latitudes (|b| > 10) and energies of 1-100 GeV, recently published by the Fermi Collaboration are used to produce a novel study on the gamma-ray emissivity in the…

高能天体物理现象 · 物理学 2011-10-28 Maryam Tavakoli , Ilias Cholis , Carmelo Evoli , Piero Ullio

Cosmic-ray transport in astrophysical environments is often dominated by the diffusion of particles in a magnetic field composed of both a turbulent and a mean component. This process, which is two-fold turbulent mixing in that the particle…

高能天体物理现象 · 物理学 2021-12-14 P. Reichherzer , L. Merten , J. Dörner , J. Becker Tjus , M. J. Pueschel , E. G. Zweibel

The data collected by ATIC, CREAM and PAMELA all display remarkable cosmic-ray-nuclei spectrum hardening above the magnetic rigidity $\sim$ 240 GV. One natural speculation is that the primary electron spectrum also gets hardened (possibly…

高能天体物理现象 · 物理学 2013-12-24 Lei Feng , Rui-Zhi Yang , Hao-Ning He , Tie-Kuang Dong , Yi-Zhong Fan , Jin Chang

We revisit the time-symmetric interpretation of antiparticles and explore whether it can be connected, as a speculative benchmark, to the distinct spectral structures observed in the AMS-02 electron and positron data. Rather than modifying…

高能物理 - 唯象学 · 物理学 2026-04-29 Yi Yang

The positron excess in cosmic rays has stimulated a lot of interests in the last decade. The dark matter origin of the extra positrons has attracted great attention. However, the $\gamma$-ray search set very stringent constraints on the…

高能天体物理现象 · 物理学 2024-11-07 Xing-Jian Lv , Xiao-Jun Bi , Kun Fang , Peng-Fei Yin , Meng-Jie Zhao

The antiproton flux measurements from AMS-02 offer valuable information about the nature of dark matter, but their interpretation is complicated by large uncertainties in the modeling of cosmic ray propagation. In this work we present a…

高能物理 - 唯象学 · 物理学 2023-03-15 Sowmiya Balan , Felix Kahlhoefer , Michael Korsmeier , Silvia Manconi , Kathrin Nippel

We perform an analysis of the simplified dark matter models in the light of cosmic ray observables by AMS-02 and Fermi-LAT. We assume fermion, scalar or vector dark matter particle with a leptophobic spin-0 mediator that couples only to…

高能物理 - 唯象学 · 物理学 2018-03-14 Tong Li

The aperture mass has been shown in a series of recent publications to be a useful quantitative tool for weak lensing studies, ranging from cosmic shear to the detection of a mass-selected sample of dark matter haloes. Quantitative…

天体物理学 · 物理学 2011-05-23 Katrin Reblinsky , Guido Kruse , Bhuvnesh Jain , Peter Schneider

We present a package to simulate long-term diffusive mass transport in systems with atomic scale resolution. The implemented framework is based on a non-equilibrium statistical thermo-chemo-mechanical formulation of atomic systems where…

计算物理 · 物理学 2019-10-04 Juan Pedro Mendez , Mauricio Ponga

We show the necessity for a new approach towards comprehensive and consistent simulations of the propagation of galactic cosmic rays. Our developments are optimised for addressing the spatially 3-dimensional inhomogeneous diffusion problem…

天体物理仪器与方法 · 物理学 2013-08-14 M. Werner , R. Kissmann , A. W. Strong , O. Reimer

Multicomponent gas transport is investigated with unprecedented precision by AC impedance analysis of porous YSZ anode-supported solid oxide fuel cells. A fuel gas mixture of H2-H2O-N2 is fed to the anode, and impedance data are measured…

化学物理 · 物理学 2014-09-11 Yeqing Fu , Yi Jiang , Abhijit Dutta , Aravind Mohanram , John D. Pietras , Martin Z. Bazant