Results 71 to 80 of about 260,461 (223)

Status of cosmic-ray antideuteron searches

, 2015
The precise measurement of cosmic-ray antiparticles serves as important means for identifying the nature of dark matter. Recent years showed that identifying the nature of dark matter with cosmic-ray positrons and higher energy antiprotons is difficult ...
Aramaki, T., Boggs, S., Bufalino, S., Dal, L., Donato, F., Fornengo, N., Fuke, H., Grefe, M., Hailey, C., Hamilton, B., Ibarra, A., Mitchell, J., Mognet, I., Ong, R. A., Pereira, R., Perez, K., Putze, A., Raklev, A., Salati, P., Sasaki, M., Tarle, G., Urbano, A., Vittino, A., von Doetinchem, P., Wild, S., Xue, W., Yoshimura, K.   +26 more
core   +2 more sources

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data [PDF]

Annales Geophysicae, 2005
According to NOAA space weather scales, geomagnetic storms of scales G5 (3-h index of geomagnetic activity Kp=9), G4 (Kp=8) and G3 (Kp=7) are dangerous for satellites, aircrafts, and even for technology on the ground (influence on power systems, on ...
L. I. Dorman, L. I. Dorman
doaj   +1 more source

Origin of cosmic rays [PDF]

Astroparticle Physics, 2012
It is argued that there are three `origins' of cosmic rays; the origin of the particles, the origin of the energy, and the site of the acceleration. The evidence for each origin is discussed and a plausible synthesis outlined for the particles of Galactic origin where the energy comes mainly (but not exclusively) from supernova explosions, the site of ...
openaire   +3 more sources

Anomalous cosmic rays [PDF]

AIP Conference Proceedings, 2013
We review the observed properties of anomalous cosmic rays and the present status of our knowledge of the processes by which they originate. We compiled a comprehensive set of ACR energy spectral data from various spacecraft throughout the heliosphere during the passes of Ulysses over the poles of the Sun and present first results of a detailed ...
Cummings, Alan C., Stone, Edward C.
openaire   +4 more sources

Revisiting metastable cosmic string breaking

Journal of High Energy Physics
Metastable cosmic strings appear in models of new physics with a two-step symmetry breaking G → H → 1, where π 1(H) ≠ 0 and π 1(G) = 0. They decay via the monopole-antimonopole pair creation inside. Conventionally, the breaking rate has been estimated by
Akifumi Chitose, Masahiro Ibe, Yuhei Nakayama, Satoshi Shirai, Keiichi Watanabe   +4 more
doaj   +1 more source

Radiation Dosimetry Estimations in the Venusian Atmosphere during Different Periods of Solar Activity

Universe, 2022
The new space era has expanded the exploration of other planets of our solar system. In this work, radiation quantities are estimated in the Venusian atmosphere using the software tool DYASTIMA/DYASTIMA-R, such as the energy deposit and the ambient dose ...
Anastasia Tezari, Argyris N. Stassinakis, Pavlos Paschalis, Helen Mavromichalaki, Christina Plainaki, Anastasios Kanellakopoulos, Norma Crosby, Mark Dierckxsens, Pantelis Karaiskos   +8 more
doaj   +1 more source

Cosmic-ray propagation in molecular clouds

, 2013
Cosmic-rays constitute the main ionising and heating agent in dense, starless, molecular cloud cores. We reexamine the physical quantities necessary to determine the cosmic-ray ionisation rate (especially the cosmic ray spectrum at E < 1 GeV and the ...
A Dalgarno, A E Glassgold, A E Glassgold, A V Phelps, A W Strong, B J McCall, B J McCall, B. D. G. Chandran, C Boisanger de, C Ceccarelli, C Ceccarelli, C Cecchi-Pestellini, C J Cesarski, C Pinto, D A Neufeld, D Casadei, D Galli, E F Dishoeck van, F. F. S. Tak van der, F. F. S. Tak van der, H M Butner, I V Moskalenko, J Gonçalves, J H Black, J H Black, J M Girart, J P Williams, J Skilling, L Spitzer, M Meneguzzi, M Padovani, M Padovani, M Takayanagi, N Indriolo, P Caselli, R A Mewaldt, R Kulsrud, R Ramaty, R Ramaty, R Schlickeiser, S D Doty, S Gabici, S Hayakawa, S J Desch, S Maret, S R Federman, T E Cravens, T Hezareh, T R Geballe, T Umebayashi, T W Hartquist, T W Hartquist, W E Swartz, W R Webber, W R Webber, Y.-W. Tang, Z.-Y. Li   +56 more
core   +1 more source

Astrospheres and Cosmic Rays [PDF]

Journal of Physics: Conference Series, 2019
Paper for ECRS-2018, to be published.
A. Sadovski, A. Struminsky
openaire   +3 more sources

A Discussion on the Origin of the Sub-PeV Galactic Gamma-Ray Emission

The Astrophysical Journal
Galactic diffuse gamma-ray flux measured by the Tibet AS γ experiment and the total Galactic gamma-ray flux measured by the Large High Altitude Air Shower Observatory (LHAASO) are found to be consistent, within the statistical and systematic ...
S. Kato, R. Alves Batista, M. Anzorena, K. Awai, D. Chen, K. Fujita, R. Garcia, J. Huang, G. Imaizumi, T. Kawashima, K. Kawata, A. Mizuno, M. Ohnishi, C. Prévotat, T. Sako, T. K. Sako, F. Sugimoto, M. Takita, Y. Yokoe   +18 more
doaj   +1 more source

TeV Instrumentation: Current and Future

Galaxies, 2022
During the last 20 years, TeV astronomy has turned from a fledgling field, with only a handful of sources, into a fully-developed astronomy discipline, broadening our knowledge on a variety of types of TeV gamma-ray sources. This progress has been mainly
Julian Sitarek
doaj   +1 more source