Results 41 to 50 of about 19,051 (197)

The need for hard spectra sources of nearby heavy cosmic rays

EPJ Web of Conferences, 2013
Using recent Auger energy spectrum and composition analysis results, an investigation is carried out into the requirements placed on the UHECR sources.
Taylor Andrew M.
doaj   +1 more source

The quest for extragalactic magnetic fields [PDF]

Proceedings of Neutrino Oscillation Workshop — PoS(NOW2016), 2017
3 pages, 1 figure, Proceeding of Neutrino Oscillation Workshop, 4-11 September 2016, Otranto (Italy)
openaire   +2 more sources

The Magnetic Fields of Starburst Galaxies. I. Identification and Characterization of the Thermal Polarization in the Galactic Disk and Outflow

The Astrophysical Journal, 2023
Far-infrared polarized emission by means of magnetically aligned dust grains is an excellent tracer of the magnetic fields (B-fields) in the cold phase of the galactic outflows of starburst galaxies.
Enrique Lopez-Rodriguez
doaj   +1 more source

Stochastic conversions of TeV photons into axion-like particles in extragalactic magnetic fields [PDF]

, 2009
Very-high energy photons emitted by distant cosmic sources are absorbed on the extragalactic background light (EBL) during their propagation. This effect can be characterized in terms of a photon transfer function at Earth.
A. Arvanitaki, A. De Angelis, A. Mirizzi, Alessandro Mirizzi, C. Csáki, CAST collaboration, CAST collaboration, Daniele Montanino, F. Aharonian, F. Caspers, F.W. Stecker, F.W. Stecker, L. Costamante ., M. Fairbairn, N. Bassan, P. Blasi, P. Svrček, P.P. Kronberg, W. Essey, W. Heitler, WMAP collaboration, X.-J. Bi   +21 more
core   +2 more sources

Estimating extragalactic Faraday rotation [PDF]

, 2015
(abridged) Observations of Faraday rotation for extragalactic sources probe magnetic fields both inside and outside the Milky Way. Building on our earlier estimate of the Galactic contribution, we set out to estimate the extragalactic contributions.
Akahori, Takuya, Carretti, Ettore, Enßlin, Torsten A., Gaensler, Bryan M., Goobar, Ariel, Greiner, Maksim, Harvey-Smith, Lisa, Johnston-Hollitt, Melanie, Junklewitz, Henrik, Oppermann, Niels, Pratley, Luke, Schnitzeler, Dominic H. F. M., Stil, Jeroen M., Vacca, Valentina   +13 more
core   +2 more sources

Propagation of Ultra High Energy Cosmic Rays in Extragalactic Magnetic Fields: A view from cosmological simulations

, 2016
We use the CRPropa code to simulate the propagation of ultra high energy cosmic rays (with energy $\geq 10^{18} \rm eV$ and pure proton composition) through extragalactic magnetic fields that have been simulated with the cosmological ENZO code.We test ...
Brueggen, Marcus, Dundovic, Andrej, Hackstein, Stefan, Sigl, Guenter, Vazza, Franco   +4 more
core   +1 more source

BL Lac Contribution to the Extragalactic Gamma-Ray Background [PDF]

, 2007
Very high energy gamma-rays from blazars traversing cosmological distances through the metagalactic radiation field can convert into electron-positron pairs in photon-photon collisions. The converted gamma-rays initiate electromagnetic cascades driven by
Aharonian, Aharonian, Aharonian, Bade, Beckmann, Chiang, Coppi, Costamante, Costamante, Fossati, Ghisellini, Gioia, Giommi, Gorbunov, Hunter, K. Mannheim, Kneiske, Kneiske, Kronberg, Laurent-Mühleisen, Maciolek-Niedzwiecki, Mannheim, Mannheim, Protheroe, Protheroe, Rector, Reimer, Reimer, Reimer, Ryu, Sigl, Sreekumar, Stawarz, Stawarz, Stecker, T. M. Kneiske, Waxman, Wei   +37 more
core   +2 more sources

Propagation of ultrahigh energy protons in regular extragalactic magnetic fields [PDF]

Physical Review D, 2003
6 pages, 4 figures Comments for revised version: 12 pages, 12 figures. Enlarged discussion of effects on cosmic ray spectrum.
Stanev, Todor, Seckel, David, Engel, Ralph   +2 more
openaire   +3 more sources

Model of Super-Alfvénic MHD Turbulence and Statistics of Polarization

The Astrophysical Journal
MHD turbulence driven at velocities higher than the Alfvén velocity, i.e., super-Alfvénic turbulence, is widely spread in astrophysical environments, including galaxy clusters and molecular clouds.
A. Lazarian, D. Pogosyan, Yue Hu
doaj   +1 more source

CTAO sensitivity to axion-like particles [PDF]

EPJ Web of Conferences
Axion-like particles (ALPs) are a common feature in several extensions of the StandardModel, arising, for example, as a solution to the strong CP problem in quantum chromodynamics, or as a prediction of string theories.
Schiavone Francesco, Di Venere Leonardo, Giordano Francesco   +2 more
doaj   +1 more source