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A major feature of the energy spectrum of the cosmic radiation above 10$^{19}$ eV is the increasing fraction of heavy nuclei with respect to light nuclei. This fact, along with other simple assumptions, is adopted to calculate the energy…

高能天体物理现象 · 物理学 2017-07-11 Antonio Codino

Using simulation methods, distortion effects on energy spectra caused by errors in the energy determination have been investigated. For cosmic ray proton spectra, falling steeply with kinetic energy E as E-2.7, significant effects appear.…

天体物理学 · 物理学 2009-11-11 Per Carlson , Conny Wannemark

We perform a fit to measurements of the cosmic ray spectrum and of the depth of shower maximum in the energy range between $10^{15}$~eV and $10^{18}$~eV. We consider a Galactic component that is a mixture of five representative nuclear…

高能天体物理现象 · 物理学 2019-03-15 Silvia Mollerach , Esteban Roulet

The energy losses and spectra of Ultra High Energy Cosmic Rays (UHECR) are calculated for protons as primary particles. The attention is given to the energy losses due to electron-positron production in collisions with the microwave 2.73 K…

高能物理 - 唯象学 · 物理学 2007-05-23 V. Berezinsky , A. Z. Gazizov , S. I. Grigorieva

An analysis is made of the fine structure in the cosmic ray energy spectrum: new facets of present observations and their interpretation and the next step. It is argued that less than about 10% of the intensity of the helium `peak' at the…

高能天体物理现象 · 物理学 2011-11-15 A. D. Erlykin , A. W. Wolfendale

We have obtained the energy spectra of cosmic ray He, B, C, O, Mg, S and Fe nuclei in the range 0.5-1.5 GeV/nuc and above using the penetrating particle mode of the High Energy Telescope, part of the Cosmic Ray Science (CRS) experiment on…

空间物理 · 物理学 2017-12-11 W. R. Webber , N. Lal , E. C. Stone , A. C. Cummings , B. Heikkila

We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment Cosmic Ray Energetics And Mass (CREAM). The instrument included different particle detectors to provide…

We develop a theory to account for the cosmic ray spectrum between 1 GeV and 10^4 GeV following the earlier papers of this series. We use the basic concept that the cosmic ray particles are accelerated in a supernova shock that travels…

天体物理学 · 物理学 2007-05-23 Peter L. Biermann , Richard G. Strom

The unprecedented quality of the data collected by the AMS-02 experiment onboard the International Space Station allowed us to address subtle questions concerning the origin and propagation of cosmic rays. Here we discuss the implications…

高能天体物理现象 · 物理学 2019-06-05 Carmelo Evoli , Roberto Aloisio , Pasquale Blasi

The cosmic ray energy spectra of protons and helium nuclei, which are the most abundant components of cosmic radiation, exhibit a remarkable hardening at energies above one hundred GeV/nucleon. Recent data from AMS-02 confirms this feature…

高能天体物理现象 · 物理学 2017-02-08 Behrouz Khiali , Sadakazu Haino , Jie Feng

Recent observations of high energy cosmic-ray electrons by the Fermi-LAT and the HESS experiments between $20$ GeV and $5$ TeV have found that the energy spectrum closely follow a broken power-law with a break at around $1$ TeV. On the…

高能天体物理现象 · 物理学 2015-05-27 Satyendra Thoudam , Jörg R. Hörandel

Cosmological models can be constrained by determining primordial abundances. Accurate predictions of the He I spectrum are needed to determine the primordial helium abundance to a precision of $< 1$% in order to constrain Big Bang…

宇宙学与河外天体物理 · 物理学 2016-09-21 F. Guzmán , N. R. Badnell , R. J. R. Williams , P. A. M. van Hoof , M. Chatzikos , G. J. Ferland

We argue that if ultrahigh-energy (E > 10^10 GeV) cosmic rays are heavy nuclei (as indicated by existing data), then the pointing of cosmic rays to their nearest extragalactic sources is expected for 10^10.6 < E/GeV < 10^11. This is because…

高能天体物理现象 · 物理学 2017-12-25 Luis A. Anchordoqui , Vernon Barger , Thomas J. Weiler

The energy spectrum and primary composition of cosmic rays with energy between $3\times 10^{14}$ and $3\times10^{16}\unit{eV}$ have been studied using the CASA-BLANCA detector. CASA measured the charged particle distribution of air showers,…

天体物理学 · 物理学 2008-11-26 J. W. Fowler , L. F. Fortson , C. C. H. Jui , D. B. Kieda , R. A. Ong , C. L. Pryke , P. Sommers

The energy spectrum of the Coulomb potential with minimal length commutation relations $[X_i, P_j] = i\hbar\{\delta_{ij}(1+\beta P^2) + \beta'P_iP_j\}$ is determined both numerically and perturbatively for arbitrary values of $\beta'/\beta$…

高能物理 - 理论 · 物理学 2007-05-23 Sandor Benczik , Lay Nam Chang , Djordje Minic , Tatsu Takeuchi

We report cosmic-ray proton and helium spectra in energy ranges of 1 to 120 GeV and 1 to 54 GeV/nucleon, respectively, measured by a balloon flight of the BESS spectrometer in 1998. The magnetic-rigidity of the cosmic-rays was reliably…

Analysis of the experimental data on cosmic ray spectra in the framework of the proposed model with two types of sources leads to conclusion, that sources with particle generation spectral exponent $p\sim 2.85$ give the major contribution…

天体物理学 · 物理学 2008-11-26 A. A. Lagutin , A. G. Tyumentsev , A. V. Yushkov

The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach in finding their origin. Locating the "knees" of the spectra is an important part of the approach and has yet to be achieved. Here…

We present a new local interstellar spectrum for cosmic ray electrons over an energy range from 1 MeV to 70 GeV. Below (0.8 plus minus 0.2) GeV it has a power law form, E^-(1.55 plus minus 0.05), with E kinetic energy, which is consistent…

太阳与恒星天体物理 · 物理学 2013-08-12 M. S. Potgieter , E. E. Vos , R. R. Nndanganeni , M. Boezio , R. Munini

The results of ATIC-2 baloon experiment (2002-2003) for energy spectra of protons, He, C, O, Ne, Mg, Si, Fe, some groups of nuclei, and all-particle spectrum in primary cosmic rays are presented in energy region 50GeV--200TeV. The…