Energy Spectra of 3He, 4He, C, O, and Fe Suprathermal Ions per 1 AU in Particle Flows from Coronal Holes in the 23rd and 24th Solar Cycles

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The energy spectra of ions 3He, 4He, C, O and Fe with energies of 0.04–2 MeV/nucleon were studied at 1 AU in solar-wind streams from near-equatorial coronal holes during the decline of solar activity in cycle 23 according to the information of the ULEIS, SWICS, and SWEPAM instruments installed onboard the ACE spacecraft. The results of this work show that suprathermal ions from coronal holes are Maxwellian solar-wind ions accelerated on the Sun and/or in interplanetary space and form a high-energy contribution to solar-wind ions (a suprathermal “tail” in the energy distribution of solar-wind ions). The energy spectra of accelerated “tail” ions have different dependences on energy, which indicates different mechanisms of their acceleration. The relationship between the intensity of suprathermal ions and the speed of the solar wind indicates the effectiveness of the acceleration of Maxwellian solar-wind ions.

作者简介

M. Zeldovich

Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119991, Moscow, Russia

Email: ms.zeldovich@mail.ru
Россия, Москва

Yu. Logachev

Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119991, Moscow, Russia

编辑信件的主要联系方式.
Email: ms.zeldovich@mail.ru
Россия, Москва

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