Results 11 to 20 of about 4,292,570 (358)

Impact of Cosmic Ray Transport on Galactic Winds [PDF]

open access: yes, 2017
The role of cosmic rays generated by supernovae and young stars has very recently begun to receive significant attention in studies of galaxy formation and evolution due to the realization that cosmic rays can efficiently accelerate galactic winds. Microscopic cosmic ray transport processes are fundamental for determining the efficiency of cosmic ray ...
R. Farber   +3 more
arxiv   +3 more sources

Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade. [PDF]

open access: yesJ Cosmol Astropart Phys, 2020
The precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature of dark matter and other new astrophysical phenomena, and could be used with other cosmic-ray species to understand cosmic-ray production and ...
von Doetinchem P   +61 more
europepmc   +3 more sources

Cosmic-Ray Extremely Distributed Observatory [PDF]

open access: yesSymmetry, 2020
The Cosmic-Ray Extremely Distributed Observatory (CREDO) is a newly formed, global collaboration dedicated to observing and studying cosmic rays (CR) and cosmic-ray ensembles (CRE): groups of at least two CR with a common primary interaction vertex or ...
P. Homola   +62 more
semanticscholar   +1 more source

Towards Understanding the Origin of Cosmic-Ray Positrons and Electrons

open access: yesProceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020), 2021
Precision measurements of cosmic-ray positron flux by the Alpha Magnetic Spectrometer on the International Space Station are presented based on 1.9 million positrons up to 1 TeV. The positron flux exhibits distinct and complex energy dependence.
M. Aguilar   +226 more
semanticscholar   +1 more source

Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite. [PDF]

open access: yesSci Adv, 2019
DAMPE satellite has directly measured the cosmic ray proton spectrum from 40 GeV to 100 TeV and revealed a new feature at about 13.6 TeV. The precise measurement of the spectrum of protons, the most abundant component of the cosmic radiation, is ...
DAMPE Collaboration   +155 more
europepmc   +3 more sources

Open Questions in Cosmic-Ray Research at Ultrahigh Energies [PDF]

open access: yesFrontiers in Astronomy and Space Sciences, 2019
We review open questions and prospects for progress in ultrahigh-energy cosmicray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in ...
R. Alves Batista   +15 more
semanticscholar   +1 more source

Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons [PDF]

open access: yesNature, 2017
High-energy cosmic-ray electrons and positrons (CREs), which lose energy quickly during their propagation, provide a probe of Galactic high-energy processes and may enable the observation of phenomena such as dark-matter particle annihilation or decay ...
G. Ambrosi   +157 more
semanticscholar   +1 more source

On the lithium abundance of the visual binary components ξ Boo A (G8V) and ξ Boo B (K5V)

open access: yesAstronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022
Abstract A spectroscopic investigation of the lithium resonance doublet in ξ Boo A and ξ Boo B in terms of both abundance and isotopic ratio is presented. We obtained new R = 130,000 spectra with a signal‐to‐noise ratio (S/N) per pixel of up to 3200 using the 11.8 m LBT and PEPSI.
Klaus G. Strassmeier, Matthias Steffen
wiley   +1 more source

Chromosomal breaks at the origin of small tandem DNA duplications

open access: yesBioEssays, Volume 45, Issue 1, January 2023., 2023
Small tandem DNA duplications form a specific mutational signature frequently found in human disease alleles and cancer genes. Here we hypothesize that these duplications mainly arise at chromosomal DNA breaks that result from two closely located single‐stranded nicks, through error‐prone repair by the non‐homologous end‐joining pathway. Abstract Small
Joost Schimmel   +3 more
wiley   +1 more source

Introduction to Cosmic Rays [PDF]

open access: yes, 2007
Energetic particles, traditionally called Cosmic Rays, were discovered nearly a hundred years ago, and their origin is still uncertain. Their main constituents are the normal nuclei as in the standard cosmic abundances of matter, with some enhancements for the heavier elements; there are also electrons, positrons and anti-protons, but no anti-nuclei ...
Biermann, Peter, Sigl, Guenter
openaire   +4 more sources

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