Results 31 to 40 of about 8,442 (193)

The Effects of Discreteness of Galactic Cosmic‐Ray Sources [PDF]

The Astrophysical Journal, 2004
Most studies of GeV Galactic Cosmic Rays (GCR) nuclei assume a steady state/continuous distribution for the sources of cosmic rays, but this distribution is actually discrete in time and in space. The current progress in our understanding of cosmic ray physics (acceleration, propagation), the required consistency in explaining several GCRs ...
Taillet, R., Salati, P., Maurin, D., Vangioni-Flam, E., Cassé, M.   +4 more
openaire   +3 more sources

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

The 22-Year Hale Cycle in Cosmic Ray Flux – Evidence for Direct Heliospheric Modulation [PDF]

, 2014
The ability to predict times of greater galactic cosmic ray (GCR) fluxes is important for reducing the hazards caused by these particles to satellite communications, aviation, or astronauts.
Thomas, SR, Lockwood, M, Owens, MJ
core  

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

, 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   +2 more sources

Cis–Trans Rotational Isomerism of Formic Acid, Sulfur, and Selenium Analogues and Their Dimers: Chemical Kinetics Under Interstellar Conditions

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT We present chemical kinetic rate constants for the cis to trans isomerisation or rotamerization of monomeric seleno‐, thio‐, and formic acids and that of three of their dimeric species, based on variational transition state theory and multidimensional tunneling calculations in the gas‐phase, from 10 K to 300 K. These provide, firstly, reliable
Judith Wurmel, John M. Simmie
wiley   +1 more source

20. COSMIC RAYS [PDF]

, 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  

Ionization of the Venusian atmosphere from Solar and Galactic Cosmic Rays [PDF]

, 2015
The atmospheres of the terrestrial planets are exposed to solar and galactic cosmic rays, the most energetic of which are capable of affecting deep atmospheric layers through extensive nuclear and electromagnetic particle cascades.
Desorgher, L, Nordheim, Tom, Jones, Geraint H., Nordheim, T.A., Coates, A.J., Dartnell, LR, Coates, AJ, Coates, Andrew J., Jones, G.H., Jones, GH, Dartnell, L., Nordheim, T, Dartnell, L.R., Desorgher, L.   +13 more
core   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

GEV-TEV GALACTIC COSMIC RAYS [PDF]

Particle Physics at the Year of Centenary of Bruno Pontecorvo, 2015
This short review aims at presenting the way we currently understand, model, and constrain the transport of cosmic rays in the GeV-TeV energy domain. This is a research field per se, but is also an important tool e.g. to improve our understanding of the cosmic-ray sources, of the diffuse non-thermal Galactic emissions (from radio wavelengths to gamma ...
openaire   +2 more sources

Galactic Cosmic-Rays in a Breeze [PDF]

Nuclear and Particle Physics Proceedings, 2018
9 pages, 3 figures. Proceedings of the conference "Cosmic ray origin - beyond the standard models" (San Vito, Italy, 2016).
Giacinti, G., Taylor, A.
openaire   +3 more sources