Quiet-time spectra and abundances of energetic particles during the 1996 solar minimum

Authors
Citation
Dv. Reames, Quiet-time spectra and abundances of energetic particles during the 1996 solar minimum, ASTROPHYS J, 518(1), 1999, pp. 473-479
Citations number
31
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
518
Issue
1
Year of publication
1999
Part
1
Pages
473 - 479
Database
ISI
SICI code
0004-637X(19990610)518:1<473:QSAAOE>2.0.ZU;2-V
Abstract
We report the energy spectra and abundances of ions with atomic number, Z, in the interval 2 less than or equal to Z less than or equal to 36 and ener gies similar to 3-20 MeV amu(-1) for solar and interplanetary quiet periods between 1994 November and 1998 April, as measured by the large-geometry Lo w-Energy Matrix Telescope on the Wind spacecraft near Earth. The energy spe ctra show the presence of galactic and "anomalous" cosmic-ray components (G CR and ACR, respectively), depending on the element. ACR components are rep orted for Mg and Si for the first time at 1 AU, and the previous observatio n of S and Ar is confirmed. However, only GCR components are clearly appare nt for the elements Ca, Ti, Cr, Fe, as well as for C. New limits are placed on a possible ACR contribution for other elements, including Kr.