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A detailed analysis is performed of transverse momentum spectra of several identified hadrons in high energy collisions within the framework of the statistical model of hadronisation. The effect of the decay chain following hadron…

高能物理 - 唯象学 · 物理学 2009-10-31 F. Becattini , L. Bellucci , G. Passaleva

A detailed investigation of radio galaxies has recently stressed these sources as the possible origin of the cosmic rays observed above $3\,\text{EeV}$. Here, the relevance of this model at energies below $3\,\text{EeV}$ is investigated.…

高能天体物理现象 · 物理学 2019-06-12 Björn Eichmann

In a comprehensive model of Cosmic Rays (CRs) proposed a decade ago, the energies of the spectral "knees" of the various CR species were predicted to be proportional to mass, rather than charge. The model also predicts the knees to occur at…

高能物理 - 唯象学 · 物理学 2019-02-12 A. De Rújula

The differential energy spectrum of cosmic rays from Cherenkov radiation measurements in EAS in the energy range of 10^15-10^20eV has been compared with an anomalous diffusion model for the particles in interstellar space having fractal…

天体物理学 · 物理学 2018-08-08 S. P. Knurenko , A. A. Ivanov , A. V. Sabourov

Taking advantage of a recent FORS2/VLT spectroscopic sample of Extreme Horizontal Branch (EHB) stars in $\omega$ Cen, we isolate 38 spectra well suited for detailed atmospheric studies and determine their fundamental parameters ($T_{\rm…

太阳与恒星天体物理 · 物理学 2015-06-22 Marilyn Latour , Suzanna K. Randall , Gilles Fontaine , Giuseppe Bono , Annalisa Calamida , Pierre Brassard

We present the results of a direct measurement of the cosmic-ray helium spectrum with the CALET instrument in operation on the International Space Station since 2015. The observation period covered by this analysis spans from October 13,…

Air showers recorded by the Haverah Park Array during the years 1974 - 1987 have been re-analysed. For the original estimate of the energy spectrum, a relationship between the ground parameter $\rho$(600) and the primary energy, as…

天体物理学 · 物理学 2009-11-07 M. Ave , J. Knapp , J. Lloyd-Evans , M. Marchesini , A. A. Watson

The process that allows cosmic rays to escape from their sources and be released into the Galaxy is still largely unknown. The comparison between cosmic-ray electron and proton spectra measured at Earth suggests that electrons are released…

高能天体物理现象 · 物理学 2021-10-14 Giovanni Morlino , Silvia Celli

We fit the ultra high energy cosmic ray spectra above 10$^{19}$ eV with different injection spectra at cosmic ray sources that are uniformly and homogeneously distributed in the Universe. We conclude that the current UHE spectra are…

天体物理学 · 物理学 2011-05-12 Daniel De Marco , Todor Stanev

The solar modulation of galactic cosmic rays (GCR) can be studied in detail by examining long-term variations of the GCR energy spectrum (e.g. on the scales of a solar cycle). With almost 20 years of data, the Electron Proton Helium…

空间物理 · 物理学 2016-03-10 P. Kühl , R. Gómez-Herrero , B. Heber

The TRACER instrument (``Transition Radiation Array for Cosmic Energetic Radiation'') has been developed for direct measurements of the heavier primary cosmic-ray nuclei at high energies. The instrument had a successful long-duration…

天体物理学 · 物理学 2008-05-13 M. Ave , P. J. Boyle , F. Gahbauer , C. Hoppner , J. R. Horandel , M. Ichimura , D. Muller , A. Romero-Wolf

A brief review about the chemical composition of cosmic rays in the energy range 10^15 < E < 10^20 eV is given. While there is convincing evidence for an increasingly heavier composition above the knee, no clear picture has emerged at the…

天体物理学 · 物理学 2007-05-23 K. -H. Kampert

We have published the energy spectrum of ultra-high energy cosmic rays (UHECRs) for E > 10^18.2 eV from our first 5-year observation with the surface detectors of Telescope Array. We found two breaking points in the power-law spectrum, a…

高能天体物理现象 · 物理学 2019-08-13 E. Kido , O. E. Kalashev

The energy spectrum of cosmic rays above 2.5x10^18eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the flux, J ~ E^-gamma, at energies between 4x10^18eV and 4x10^19eV is…

天体物理学 · 物理学 2012-08-27 The Pierre Auger Collaboration

There are some discrepancies in the results on energy spectrum from Yakutsk, AGASA, and HiRes experiments. In this work differential energy spectrum of primary cosmic rays based on the Yakutsk EAS Array data is presented. For the largest…

The main purpose of this work is to find the causes of the break of the cosmic ray spectrum at an energy of 3 PeV, which is called the knee. The solution of the problem is associated with the determination of the nuclear composition of…

高能天体物理现象 · 物理学 2022-09-28 S. B. Shaulov , V. A. Ryabov , S. E. Pyatovsky , A. L. Shepetov , V. V. Zhukov

A precise measurement of the cosmic-ray proton spectrum with the Calorimetric Electron Telescope (CALET) is presented in the energy interval from 50 GeV to 60 TeV, and the observation of a softening of the spectrum above 10 TeV is reported.…

A spectral approach is used to evaluate energies and widths for a wide range of singlet and triplet resonance states of helium. Data for total angular momentum $L=1,...,4$ is presented for resonances up to below the 5th single ionization…

原子物理 · 物理学 2012-01-23 Johannes Eiglsperger , Moritz Schönwetter , Bernard Piraux , Javier Madroñero

One prediction of particle acceleration in the supernova remnants in the magnetic wind of exploding Wolf Rayet and Red Super Giant stars is that the final spectrum is a composition of a spectrum $E^{-7/3}$ and a polar cap component of…

高能天体物理现象 · 物理学 2010-12-01 Peter L. Biermann , Julia K. Becker , Jens Dreyer , Athina Meli , Eun-Suk Seo , Todor Stanev

Heavy element and helium diffusion are both included for the first time in this series of papers on precise solar models, along with improvements in the input data for nuclear reaction rates, the solar luminosity, the solar age, heavy…

高能物理 - 唯象学 · 物理学 2008-11-26 John N. Bahcall , M. H. Pinsonneault