Results 91 to 100 of about 401,654 (242)

Validation of Global Ionospheric Specification (GIS) Electron Density Measurements During Solar Minimum to Solar Maximum Under Quiet and Disturbed Geomagnetic Conditions

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh, C. H. Charles Lin, C. Y. Lin, T. Matsuo, H. Jin, S. Perwitasari, M. Nishioka, Chao‐Yen Chen   +7 more
wiley   +1 more source

Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station [PDF]

, 2019
A precision measurement of the nitrogen flux with rigidity (momentum per unit charge) from 2.2 GV to 3.3 TV based on 2.2×106 events is presented. The detailed rigidity dependence of the nitrogen flux spectral index is presented for the first time.
Arruda, L., Orcinha, M., AMS collaboration (243 authors), Barao, F.   +3 more
core   +1 more source

Solar modulation of galactic cosmic rays electrons and positrons over the 23rd solar minimum with the pamela experiment

, 2013
The satellite-borne PAMELA experiment has been continuously collecting data since 15th June 2006, when it was launched from the Baikonur cosmodrome to detect the charged component of cosmic rays over a wide energy range and with an unprecedented ...
Papini P., Mayorov A. G., Menn W., Mori N., Pizzolotto C., Vasilyev G., Koldashov S. V., Mikhailov V. V., Palma F., Bongi M., Sarkar R., Simone N. D. E., Osteria G., Vos E. E., Campana D., Zverev V. G., Bruno A., Martucci M., Pearce M., Munini R., Formato V., Leonov A., Kvashnin A. N., Zampa G., Ricci M., Bogomolov E. A., Krutkov S. Y., Vacchi A., Bottai S., Simon M., Ricciarini S. B., Malakhov V., Bonvicini V., Monaco A., Picozza P., Cafagna F., Castellini G., Donato C. D. E., Galper A. M., Bazilevskaya G. A., Spillantini P., Koldobskiy S., Casolino M., Zampa N., Stozhkov Y. I., Voronov S. A., Vannuccini E., Felice V. D. I., Karelin A. V., Barbarino G. C., Boezio M., Santis C. D. E., Danilchenko I. A., Adriani O., Potgieter M. S., Yurkin Y. T., Carbone R., Scotti V., Strauss R., Marcelli L., Bellotti R., Merge M., Mocchiutti E., Carlson P., Sparvoli R.   +64 more
core   +1 more source

Can Solar Cyclic Variability Mimic Extreme Solar Particle (Miyake) Events in Radiocarbon?

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Rapid, strong enhancements in Δ14 ${{\Delta }}^{14}$C in the Earth's atmosphere, known as Miyake events, rarely occurred over the past millennia, pointing to major radiation storms affecting Earth. They are produced by extreme solar particle events (ESPEs) and are separated by an order‐of‐magnitude gap in the strength from directly observed ...
Ilya Usoskin, Fusa Miyake, Kseniia Golubenko   +2 more
wiley   +1 more source

20. COSMIC RAYS

, 2008
The cosmic radiation incident at the top of the terrestrial atmosphere includes all stable charged particles and nuclei with lifetimes of order 106 years or longer.
Cosmic Rays
core  

Physics from Time Variability of the VHE Blazar PKS 2155-304 [PDF]

, 2010
Blazars are the principal extragalactic sources of very high energy gamma-ray emission in the Universe. These objects constitute a sub-class of Active Galactic Nuclei whose emission is dominated by Doppler boosted non-thermal radiation from plasma ...
BARRES-DE-ALMEIDA, ULISSES
core  

Active galactic nuclei: sources for ultra high energy cosmic rays [PDF]

, 2009
Ultra high energy cosmic ray events presently show a spectrum, which we interpret here as galactic cosmic rays due to a starburst, in the radio galaxy Cen A which is pushed up in energy by the shock of a relativistic jet.
Meli, Athina, LÁ, Gergely, T, Stanev, MELI, A., P. L. BIERMANN, Becker, Julia J.K., IC, Mariş, JK, Becker, V. DE SOUZA, Souza, Vitor de, A. MELI, Biermann, Peter P.L., T. STANEV, CARAMETE, L., A, Meli, BECKER, J. K., L. GERGELY, Stanev, Todor, I. C. MARIŞ, GERGELY, L., L, Caramete, V, de Souza, STANEV, T., Gergely, László Árpád L., De Souza, Vitor, Caramete, Laurent¸iu Ioan L., J. K. BECKER, Maris, Ioana Codrina, Souza, V. de, MARIS, I. C., L. CARAMETE, PL, Biermann, BIERMANN, P. L.   +32 more
core   +1 more source

Galactic cosmic rays & gamma rays: a synthesis

, 1999
latex 8 pages, uses paspconf.sty, 9 figures. To appear in Proc. of the Workshop "LiBeB, Cosmic Rays and Gamma-Ray Line Astronomy", eds. R. Ramaty, E. Vangioni-Flam, M. Casse, and K. Olive, ASP Conf. Ser. (ASP, 1999).
Strong, A. W., Moskalenko, I. V.
openaire   +2 more sources

On the origin of galactic cosmic rays [PDF]

New Astronomy, 2014
15 pages, 5 ...
openaire   +2 more sources

A Possible Common Physics Picture Reflected by the Gamma-Ray Emission of the Galactic Center

The Astrophysical Journal
Long-term observations of the Galactic center by Fermi and HESS have revealed a novel phenomenon: the high-energy gamma-ray spectrum from the gamma-ray source HESS J1745-290 exhibits a double power-law structure.
Lin Nie, Yi-Qing Guo, Si-Ming Liu
doaj   +1 more source