Results 61 to 70 of about 260,461 (223)

An Assessment of the GLE Alert++ Warning System

Atmosphere
Over the last years the Athens Cosmic Ray Group of the National & Kapodistrian University of Athens has implemented a warning tool called GLE Alert, which is a highly credible application that issues alerts when a ground level enhancement (GLE) starts ...
Helen Mavromichalaki, Pavlos Paschalis, Maria Gerontidou, Anastasia Tezari, Maria-Christina Papailiou, Dimitra Lingri, Maria Livada, Argyris Stassinakis, Norma Crosby, Mark Dierckxsens   +9 more
doaj   +1 more source

Supernova Remnants as the Sources of Galactic Cosmic Rays [PDF]

, 2012
The origin of cosmic rays holds still many mysteries hundred years after they were first discovered. Supernova remnants have for long been the most likely sources of Galactic cosmic rays.
Vink, Jacco
core   +2 more sources

Cosmic ray source abundances and the acceleration of cosmic rays [PDF]

AIP Conference Proceedings, 2000
The galactic cosmic ray elemental source abundances display a fractionation that is possibly based on first ionization potential (FIP) or volatility. A few elements break the general correlation of FIP and volatility and the abundances of these may help to distinguish between models for the origin of the cosmic ray source material. Data from the Cosmic
George, J. S., Wiedenbeck, M. E., Barghouty, A. F., Binns, W. R., Christian, E. R., Cummings, A. C., Hink, P. L., Klarmann, J., Leske, R. A., Lijowski, M., Mewaldt, R. A., Stone, E. C., von Rosenvinge, T. T., Yanasak, N. E.   +13 more
openaire   +3 more sources

Southern Hemisphere Observations of a $10^{18}$eV Cosmic Ray Source Near the Direction of the Galactic Centre [PDF]

, 2000
We report on an analysis of data from the southern hemisphere SUGAR cosmic ray detector. We confirm the existence of an excess of $10^{18}$eV cosmic rays from a direction close to the Galactic Centre, first reported by the AGASA group.
B.R. Dawson, Bird, Cassiday, Hayashida, J.A. Bellido, Lee, M. Johnston-Hollitt, Nagano, Protheroe, R.W. Clay, Schönfelder, Winn   +11 more
core   +2 more sources

Origin of Cosmic Rays [PDF]

Nature, 1948
IT is important to decide whether or not the main sources of the cosmic ray particles are external to our galaxy. An external source seems, at first sight, to be established by the observed isotropy of the cosmic rays incident on the earth. But it has been claimed by a number of authors that this isotropy is simply a consequence of a magnetic field ...
Fred Hoyle, J. W. Dungey
openaire   +3 more sources

Estimation of Cosmic-Ray-Induced Atmospheric Ionization and Radiation at Commercial Aviation Flight Altitudes

Applied Sciences, 2022
The main source of the ionization of the Earth’s atmosphere is the cosmic radiation that depends on solar activity as well as geomagnetic activity. Galactic cosmic rays constitute a permanent radiation background and contribute significantly to the ...
Panagiota Makrantoni, Anastasia Tezari, Argyris N. Stassinakis, Pavlos Paschalis, Maria Gerontidou, Pantelis Karaiskos, Alexandros G. Georgakilas, Helen Mavromichalaki, Ilya G. Usoskin, Norma Crosby, Mark Dierckxsens   +10 more
doaj   +1 more source

Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays [PDF]

, 2016
The determination of the injection composition of cosmic ray nuclei within astrophysical sources requires sufficiently accurate descriptions of the source physics and the propagation - apart from controlling astrophysical uncertainties.
Boncioli, Denise, Fedynitch, Anatoli, Winter, Walter   +2 more
core   +1 more source

Cosmic rays and molecular clouds

, 2012
This paper deals with the cosmic-ray penetration into molecular clouds and with the related gamma--ray emission. High energy cosmic rays interact with the dense gas and produce neutral pions which in turn decay into two gamma rays.
A Atoyan, A Bamba, A Dar, A Giuliani, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AM Atoyan, AM Hillas, AR Bell, AR Bell, AR Bell, AW Strong, AW Strong, B Reville, C Ceccarelli, CD Dermer, CJ Cesarsky, D Caprioli, DC Ellison, DC Ellison, DF Cioffi, DG Wentzel, E Parizot, F Casse, F Combes, F Giordano, FA Aharonian, FA Aharonian, FA Aharonian, FA Aharonian, FA Aharonian, FA Aharonian, G Giacinti, G Morlino, G Sinnis, GF Krymskii, GR Blumenthal, H Li, H Yan, HJ Völk, J Aleksić, J Rho, J Vink, JA Hinton, JH Black, JR Jokipii, K Koyama, M Ackermann, M Ackermann, M Actis, M Mori, M Tsuboi, MA Malkov, ML Longair, MR Issa, P Blasi, R Cowsik, R Kulsrud, R Schlickeiser, RD Blandford, RJ Protheroe, RM Crutcher, S Casanova, S Casanova, S Gabici, S Gabici, S Gabici, S Gabici, SD Hunter, SP Reynolds, SR Kelner, T Inoue, T Kamae, T Montmerle, T Naito, T Tanaka, TK Gaisser, VN Zirakashvili, VS Berezinskii, VS Ptuskin, VS Ptuskin, VS Ptuskin, VS Ptuskin, W Baade, Y Fujita, Y Fukui, Y Ohira, Y Ohira, Y Uchiyama, Y Uchiyama, Y Uchiyama, Y Uchiyama   +96 more
core   +3 more sources

Geomagnetic and Cosmic Ray Activity Effect on Heart Rate during the Solar Cycle 24

Atmosphere
The number of investigations relevant to the study of geomagnetic activity, solar events, and cosmic rays, i.e., space weather phenomena, and their impact on human health has increased dramatically over the past few years.
Maria-Christina Papailiou, Sofia Ioannidou, Anastasia Tezari, Helen Mavromichalaki   +3 more
doaj   +1 more source

Prediction of galactic cosmic ray intensity variation for a few (up to 10-12) years ahead on the basis of convection-diffusion and drift model [PDF]

Annales Geophysicae, 2005
We determine the dimension of the Heliosphere (modulation region), radial diffusion coefficient and other parameters of convection-diffusion and drift mechanisms of cosmic ray (CR) long-term variation, depending on particle energy, the level of solar
L. I. Dorman, L. I. Dorman
doaj   +1 more source