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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

Local interstellar spectra (LIS) of secondary cosmic ray (CR) nuclei, lithium, beryllium, boron, and partially secondary nitrogen, are derived in the rigidity range from 10 MV to ~200 TV using the most recent experimental results combined…

This paper describes the unfolding of the solar modulated galactic cosmic ray H and He nuclei spectra beyond ~105 AU in the heliosheath. Between 2008.0 and 2012.3 when Voyager 1 went from about 105 to 120.5 AU the spectral intensities of…

空间物理 · 物理学 2013-08-09 W. R. Webber , P. R. Higbie , F. B. McDonald

First results of a cosmic-ray electron + positron spectrum, from 10 GeV to 3 TeV, is presented based upon observations with the CALET instrument on the ISS starting in October, 2015. Nearly a half million electron + positron events are…

The measurement of an excess in the cosmic-ray electron spectrum between 300 and 800 GeV by the ATIC experiment has - together with the PAMELA detection of a rise in the positron fraction up to 100 GeV - motivated many interpretations in…

高能天体物理现象 · 物理学 2012-08-27 H. E. S. S. Collaboration , : , F. Aharonian

Local interstellar spectra (LIS) for protons, helium and antiprotons are built using the most recent experimental results combined with the state-of-the-art models for propagation in the Galaxy and heliosphere. Two propagation packages,…

Heliospheric modulation conditions were unusually quite during the last solar minimum activity between Solar Cycles 23/24. Fortunately, the PAMELA space-experiment measured six-month averaged Galactic positron spectra for the period July…

空间物理 · 物理学 2019-03-14 O. P. M. Aslam , D. Bisschoff , M. S. Potgieter , M. Boezio , R. Munini

Recently, AMS-02 reported their observed results of cosmic rays(CRs). In addition to the AMS-02 data, we add HESS data to estimate the spectra of CR electrons and the diffuse gamma rays above TeV. In the conventional diffusion model, a…

高能天体物理现象 · 物理学 2015-10-06 Ding Chen , Jing Huang , Hong-Bo Jin

The last measurement of the diffuse emission spectrum of the Milky Way in the megaelectronvolt (MeV) photon energy range was performed by CGRO/COMPTEL more than 20 years ago. We report a new analysis with the spectrometer SPI aboard…

高能天体物理现象 · 物理学 2022-02-10 Thomas Siegert , Joanna Berteaud , Francesca Calore , Pasquale D. Serpico , Christoph Weinberger

A comparison of the Helium and Carbon interstellar spectra measured at Voyager in the local interstellar medium leads to a different interpretation than a comparison of the Hydrogen to Helium spectra. This is because the He/C ratio is…

空间物理 · 物理学 2015-03-20 W. R. Webber , P. R. Higbie

We perform a consistent modeling of cosmic ray electrons, positrons and of the radio emission of the Galaxy. For the time we reproduce all relevant data sets between 1 GeV and 1 TeV including the recent AMS-02 positron fraction results. We…

高能天体物理现象 · 物理学 2013-07-01 D. Grasso , G. Di Bernardo , C. Evoli , D. Gaggero , L. Maccione

A multichannel analysis of cosmic ray electron and positron spectra and of the diffuse synchrotron emission of the Galaxy is performed by using the DRAGON code. This study is aimed at probing the interstellar electron source spectrum down…

高能天体物理现象 · 物理学 2013-04-16 Giuseppe Di Bernardo , Carmelo Evoli , Daniele Gaggero , Dario Grasso , Luca Maccione

Voyager 1 data from beyond the heliopause provide the first direct measurements of the interstellar cosmic ray spectra below 1 GeVnuc. In this paper we combine these Voyager measurements of H and He nuclei from 3-600 MeVnuc with higher…

空间物理 · 物理学 2015-03-04 W. R. Webber , P. R. Higbie

In this paper we compare galactic electron spectra measured up to TeV energies by AMS2 and CALET and that measured by Voyager at the lowest energies down to 1 MeV with that calculated using a Monte Carlo diffusion model for electron…

空间物理 · 物理学 2018-10-29 W. R. Webber , J. Quenby , T. Harrison , S. Stochaj , T. L. Villa

Local interstellar spectra (LIS) of primary cosmic ray (CR) nuclei, such as helium, oxygen, and mostly primary carbon are derived for the rigidity range from 10 MV to ~200 TV using the most recent experimental results combined with the…

Studies on Voyager 1 using the CRS instrument have shown the presence of sub-MeV electrons in the interstellar medium beyond the heliopause. We believe that these electrons are the very low energy tail of the distribution of galactic GeV…

空间物理 · 物理学 2018-07-03 W. R. Webber , N. Lal , B. Heikkila

Recent observations of cosmic ray electrons from several instruments have revealed various degrees of deviation in the measured electron energy distribution from a simple power-law, in a form of an excess around TeV energies. An even more…

星系天体物理 · 物理学 2015-05-13 Lukasz Stawarz , Vahe Petrosian , Roger D. Blandford

After the disappearance of lower energy heliospheric particles at Voyager 1 starting on August 25th, 2012, spectra of H, He and C/O nuclei were revealed that resembled those to be expected for galactic cosmic rays. These spectra had…

空间物理 · 物理学 2013-08-22 W. R. Webber , P. R. Higbie , F. B. McDonald

The acceleration of cosmic ray particles and their propagation in the Milky Way and the heliosphere tangle with each other, leading to complexity and degeneracy of the modeling of Galactic cosmic rays (GCRs). The recent measurements of the…

高能天体物理现象 · 物理学 2018-08-22 Cheng-Rui Zhu , Qiang Yuan , Da-Ming Wei

Context. Solar Energetic Particles (SEPs) with energy in the GeV range can propagate to Earth from their acceleration region near the Sun and produce Ground Level Enhancements (GLEs). The traditional approach to interpreting and modelling…

太阳与恒星天体物理 · 物理学 2020-08-04 S. Dalla , G. De Nolfo , A. Bruno , J. Giacalone , T. Laitinen , S. Thomas , M. Battarbee , M. S. Marsh