Results 41 to 50 of about 401,654 (242)
GALACTIC COSMIC RAY ANISOTROPY MODELLING
Solar-Terrestrial Physics, 2020 We calculate the angular distribution of cosmic rays at a given point of the heliosphere under the assumption that the incoming flux from outer space is isotropic. The static magnetic field is shown to cause no anisotropy provided that the observation point is situated out of the trapped particle area.
Peregoudov D.V. +3 more
openaire +4 more sources
The Astrophysical Journal, 2023 Abstract The origin of cosmic rays (CRs) above the knee in the spectrum is an unsolved problem. We present a wind model in which interstellar gas flows along a nonrotating, expanding flux tube with a changing speed and cross-sectional area.
Payel Mukhopadhyay +4 more
openaire +4 more sources
Cosmic-Ray Boosted Diffuse Supernova Neutrinos
AstronomyThe subject of boosted fluxes of dark matter or cosmic relic neutrinos via scattering on cosmic rays has received considerable attention recently. This article investigates the boosted neutrino flux from the scattering of cosmic rays and the so-far ...
Alexander Sandrock
doaj +1 more source
The mass composition of cosmic rays measured with LOFAR
EPJ Web of Conferences, 2017 High-energy cosmic rays, impinging on the atmosphere of the Earth initiate cascades of secondary particles, the extensive air showers. The electrons and positrons in the air shower emit electromagnetic radiation.
Hörandel Jörg R. +15 more
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Astrophysics of Galactic Charged Cosmic Rays [PDF]
, 2013 Invited review, to appear in Vol.5 of "Planets, Stars and Stellar Systems" Editor-in-chief: Oswalt, T.D McLean, I.S.; Bond, H.E.; French, L.; Kalas, P.; Barstow, M.; Gilmore,G.F.; Keel, W.
Castellina, Antonella, Donato, Fiorenza
openaire +2 more sources
Cosmic ray-driven winds in the Galactic environment and the cosmic ray spectrum [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 Cosmic Rays escaping the Galaxy exert a force on the interstellar medium directed away from the Galactic disk. If this force is larger than the gravitational pull due to the mass embedded in the Galaxy, then galactic winds may be launched. Such outflows may have important implications for the history of star formation of the host galaxy, and in turn ...
Recchia, S. +2 more
openaire +3 more sources
Possible Counterpart Signal of the Fermi Bubbles at the Cosmic-Ray Positrons
The Astrophysical Journal, 2023 The inner Galaxy has hosted cosmic-ray burst events, including those responsible for the gamma-ray Fermi bubbles and the eROSITA bubbles in X-rays. In this work, we study the Alpha Magnetic Spectrometer positron fraction and find three features around 12,
Ilias Cholis, Iason Krommydas
doaj +1 more source
Jupiter as a giant cosmic ray detector [PDF]
, 2014 All authors highlight financial support of the European Community under the FP7 by an ERC starting grant.We explore the feasibility of using the atmosphere of Jupiter to detect ultra-high-energy cosmic rays (UHECRs).
Rimmer, P.B., Stark, C.R., Helling, C.
core +1 more source
Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems
Astronomische Nachrichten, EarlyView.ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
wiley +1 more source
Theoretical challenges in acceleration and transport of ultra high energy cosmic rays: A review
EPJ Web of Conferences, 2013 The wealth of data collected in the last few years thanks to the Pierre Auger Observatory and recently to the Telescope Array made the problem of the origin of ultra high energy cosmic rays a genuinely experimental/observational one.
Blasi Pasquale
doaj +1 more source