Results 31 to 40 of about 3,608,924 (307)
Heliospheric modulation of cosmic rays during the neutron monitor era: Calibration using PAMELA data for 2006–2010 [PDF]
, 2017 A new reconstruction of the heliospheric modulation potential for galactic cosmic rays is presented for the neutron monitor era, since 1951. The new reconstruction is based on an updated methodology in comparison to previous reconstructions: (1) the use ...
I. Usoskin +4 more
semanticscholar +1 more source
Cosmic-Ray Rejection by Laplacian Edge Detection [PDF]
, 2001 Conventional algorithms for rejecting cosmic-rays in single CCD exposures rely on the contrast between cosmic-rays and their surroundings, and may produce erroneous results if the Point Spread Function (PSF) is smaller than the largest cosmic-rays.
Marr D., Pieter G. van Dokkum
core +2 more sources
On the Search for the Galactic PeVatrons by Means of Gamma-Ray Astronomy
Universe, 2022 Cosmic rays are ultra-relativistic particles that slam into the atmosphere from all directions in the sky. Gamma rays emitted when cosmic rays interact with Galactic gas and radiation fields are a powerful tool to investigate their origin. Many candidate
Sabrina Casanova
doaj +1 more source
Ultra-high-energy cosmic rays and neutrinos from tidal disruptions by massive black holes [PDF]
Astronomy & Astrophysics, 2017 Tidal disruptions are extremely powerful phenomena that have been designated as candidate sources of ultra-high-energy cosmic rays. The disruption of a star by a black hole can naturally provide protons and heavier nuclei, which can be injected and ...
C. Gu'epin +4 more
semanticscholar +1 more source
SUPERDIFFUSION OF COSMIC RAYS: IMPLICATIONS FOR COSMIC RAY ACCELERATION [PDF]
The Astrophysical Journal, 2014 18 pages, 6 figures, erratum in eqs.(12,13) and table 1 included, ApJ ...
A. Lazarian, Huirong Yan
openaire +3 more sources
Indirect dark matter searches in gamma and cosmic rays [PDF]
Nature Physics, 2017 Dark matter candidates such as weakly interacting massive particles are predicted to annihilate or decay into Standard Model particles, leaving behind distinctive signatures in gamma rays, neutrinos, positrons, antiprotons, or even antinuclei.
J. Conrad, O. Reimer
semanticscholar +1 more source
Active Galactic Nuclei with Starbursts: Sources for Ultra High Energy Cosmic Rays [PDF]
, 2009 Ultra high energy cosmic ray events presently show a spectrum, which we interpret here as galactic cosmic rays due to a starburst in the radio galaxy Cen A pushed up in energy by the shock of a relativistic jet.
A. MELI +12 more
core +3 more sources
Cosmic rays in astrospheres [PDF]
Astronomy & Astrophysics, 2015 Cosmic rays passing through large astrospheres can be efficiently cooled inside these "cavities" in the interstellar medium. Moreover, the energy spectra of these energetic particles are already modulated in front of the astrospherical bow shocks. We study the cosmic ray flux in and around lambda Cephei as an example for an astrosphere. The large-scale
Klaus Scherer +9 more
openaire +4 more sources
The origin of galactic cosmic rays [PDF]
, 2007 The origin of galactic cosmic rays is one of the most interesting unsolved problems in astroparticle physics. Experimentally, the problem is attacked by a multi-disciplinary effort, namely by direct measurements of cosmic rays above the atmosphere, by ...
Aharonian +54 more
core +7 more sources
Cosmic rays in early star-forming galaxies and their effects on the interstellar medium [PDF]
, 2017 Galaxies at high redshifts with strong star formation are sources of high-energy cosmic rays. These cosmic rays interact with the baryon and radiation fields of the galactic environment via photo-pair, photo-pion and proton-proton processes to produce ...
Jacobsen, Idunn B. +3 more
core +2 more sources