Quiet-time low-energy ion fluxes in the 23rd and 24th solar cycles at 1 AU

K. Kecskeméty, M. A. Zeldovich, Y. U.I. Logachev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The relative abundances of 3He, 4He, C, O and Fe ions in the energy range 0.04 to 1 MeV/nucleon and the energy spectra of 3He and Fe are investigated during quiet-time periods in the 23rd and 24th solar cycles using ACE/ULEIS data. Quiet-time fluxes of suprathermal ions with low first ionization potential (FIP) ≤ 10 eV were found to exhibit higher variability than those with high FIP (above 10 eV). The quiet periods selected were divided into three groups according to the value Fe/O in the energy range of ~40-320 keV/nucleon. In the 23rd SC except for the minimum the Fe/O ratio was within the interval of values comparable with those of impulsive SEP events or was near the mean abundance in solar corona. During solar minimum Fe/O was close to the solar wind values. Ions of these 3 groups originate from different seed particle populations: ions of the upper solar corona, those accelerated in impulsive micro SEP events, ions of quiet corona and solar wind ions, respectively. Noticeable differences in the energy spectra and energy dependences of relative abundances of suprathermal ion fluxes were found between SC 23, the 2008-09 minimum and the first 4 years of SC 24.

Original languageEnglish
Title of host publicationProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
PublisherSociedade Brasileira de Fisica
Volume2013-October
ISBN (Electronic)9788589064293
Publication statusPublished - Jan 1 2013
Event33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil
Duration: Jul 2 2013Jul 9 2013

Other

Other33rd International Cosmic Rays Conference, ICRC 2013
CountryBrazil
CityRio de Janeiro
Period7/2/137/9/13

Fingerprint

solar cycles
ions
solar corona
energy
ionization potentials
solar wind
energy spectra
coronas
seeds
intervals

Keywords

  • Low-energy ions
  • quiet solar activity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Kecskeméty, K., Zeldovich, M. A., & Logachev, Y. U. I. (2013). Quiet-time low-energy ion fluxes in the 23rd and 24th solar cycles at 1 AU. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 (Vol. 2013-October). Sociedade Brasileira de Fisica.

Quiet-time low-energy ion fluxes in the 23rd and 24th solar cycles at 1 AU. / Kecskeméty, K.; Zeldovich, M. A.; Logachev, Y. U.I.

Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Vol. 2013-October Sociedade Brasileira de Fisica, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kecskeméty, K, Zeldovich, MA & Logachev, YUI 2013, Quiet-time low-energy ion fluxes in the 23rd and 24th solar cycles at 1 AU. in Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. vol. 2013-October, Sociedade Brasileira de Fisica, 33rd International Cosmic Rays Conference, ICRC 2013, Rio de Janeiro, Brazil, 7/2/13.
Kecskeméty K, Zeldovich MA, Logachev YUI. Quiet-time low-energy ion fluxes in the 23rd and 24th solar cycles at 1 AU. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Vol. 2013-October. Sociedade Brasileira de Fisica. 2013
Kecskeméty, K. ; Zeldovich, M. A. ; Logachev, Y. U.I. / Quiet-time low-energy ion fluxes in the 23rd and 24th solar cycles at 1 AU. Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Vol. 2013-October Sociedade Brasileira de Fisica, 2013.
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