Browsing by Author "20068034 - Vos, Etienne Eben"
Now showing items 1-11 of 11
-
Difference in the heliospheric modulation of cosmic-ray protons and electrons during the solar minimum period of 2006 to 2009
Potgieter, M.S.; Vos, E.E. (EDP Sciences, 2017)Context. The PAMELA experiment observed galactic proton and electron spectra down to 70 MV and 400 MV, respectively, from mid-2006 to the end of 2009 during what is called an A < 0 solar magnetic polarity cycle. During ... -
Global gradients for cosmic-ray protons in the heliosphere during the solar minimum of cycle 23/24
Vos, E.E.; Potgieter, M.S. (Springer, 2016)Global gradients for cosmic-ray (CR) protons in the heliosphere are computed with a comprehensive modulation model for the recent prolonged solar minimum of Cycle 23/24. Fortunately, the PAMELA (Payload for Antimatter ... -
A global view of the modulation of cosmic ray protons in the heliosphere for the solar minimum period up to 2009
Potgieter, M.S.; Vos, E.E. (IOP Publishing, 2016)The heliosphere was in a state of ideal solar minimum conditions for at least three years up to the end of 2009. During this period the highest ever recorded cosmic ray spectra were observed at the Earth. Fortunately, the ... -
Modulation of galactic electrons in the heliosphere during the unusual solar minimum of 2006-2009: a modeling approach
Potgieter, M.S.; Vos, E.E.; Munini, R.; Boezio, M.; Di Felice, V. (IOP Publishing, 2015)The last solar minimum activity period, and the consequent minimum modulation conditions for cosmic rays, was unusual. The highest levels of Galactic protons were recorded at Earth in late 2009 in contrast to expectations. ... -
Modulation of galactic protons in the heliosphere during the unusual solar minimum of 2006 to 2009
Potgieter, M.S.; Vos, E.E.; Boezio, M.; De Simone, N.; Di Felice, V. (Springer Verlag, 2014)The last solar minimum activity period, and the consequent minimum modulation conditions for cosmic rays, was unusual. The highest levels of galactic protons were recorded at Earth in late 2009 in contrast to expectations. ... -
New evidence for charge-sign-dependent modulation during the solar minimum of 2006 to 2009
Di Felice, V.; Vos, E.E.; Potgieter, M.S.; Munini, R. (IOP Publishing, 2017)The PAMELA space experiment, in orbit since 2006, has measured cosmic rays (CRs) through the most recent period of minimum solar activity with the magnetic field polarity as A < 0. During this entire time, galactic electrons ... -
New modeling of galactic proton modulation during the minimum of solar cycle 23/24
Vos, Etienne E.; Potgieter, Marius S. (IOP Publishing, 2015)During the recent prolonged solar minimum of cycle 23/24, the PAMELA detector measured 27-day averaged Galactic proton energy spectra over the energy range that is important for solar modulation. By comparing these spectra ... -
Solar modulation of cosmic ray positrons in a very quiet heliosphere
Potgieter, Marius S.; Vos, Etienne E.; Bisschoff, Driaan; Raath, Jan-Louis; Boezio, Mirko (PoS, 2017)Since the beginning of the space exploration era, solar activity was observed at its lowest level during 2006 to 2009. During this period, the PAMELA space experiment observed spectra for galactic cosmic rays, specifically ... -
Time dependence of the e-flux measured by PAMELA during the 2006 July-2009 December solar minimum
Adriani, O.; Potgieter, M.S.; Vos, E.E.; Barbarino, G.C.; Bazilevskaya, G.A. (IOP Publishing, 2015)Precision measurements of the electron component of cosmic radiation provide important information about the origin and propagation of cosmic rays in the Galaxy not accessible from the study of cosmic-ray nuclear components ... -
Time dependence of the electron and positron components of the cosmic radiation measured by the PAMELA experiment between July 2006 and December 2015
Adriani, O.; Potgieter, M.S.; Vos, E.E.; Barbarino, G.C.; Bazilevskaya, G.A. (APS, 2016)Cosmic-ray electrons and positrons are a unique probe of the propagation of cosmic rays as well as of the nature and distribution of particle sources in our Galaxy. Recent measurements of these particles are challenging ... -
Time dependence of the proton flux measured by Pamela during the 2006 July-2009 December solar minimum
Adriani, O.; Potgieter, M.S.; Vos, E.E.; Barbarino, G.C.; Bazilevskaya, G.A. (IOP Science, 2013)The energy spectra of galactic cosmic rays carry fundamental information regarding their origin and propagation. These spectra, when measured near Earth, are significantly affected by the solar magnetic field. A comprehensive ...