Abundances and energy spectra of corotating interaction region heavy ions

被引：0

作者：

Mason, G. M. ^{[1
]}

Leske, R. A. ^{[2
]}

Desai, M. I. ^{[3
]}

Dwyer, J. R. ^{[4
]}

Mazur, J. E. ^{[5
]}

Mewaldt, R. A. ^{[2
]}

Gold, R. E. ^{[1
]}

Krimigis, S. M. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA

[2] CALTECH, Pasadena, CA 91125 USA

[3] SW Res Inst, San Antonio, TX 78228 USA

[4] Florida Inst Technol, Melbourne, FL 32901 USA

[5] Aerosp Corp, Chantilly, VA 20151 USA

来源：

PARTICLE ACCELERATION AND TRANSPORT IN THE HELIOSPHERE AND BEYOND | 2008年 / 1039卷

关键词：

interplanetary physics; particle acceleration; corotating streams; energetic particles; pickup ions;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have surveyed He-Fe spectra for 41 Corotating Interaction Regions (CIRs) from 1998-2007 observed on ACE. The spectra are similar for all species, and have the form of broken power laws with the spectral break occurring at a few MeV/nucleon. Except for overabundances of He and Ne, the abundances are close to those of the solar wind. We find the rare isotope 3 He is enhanced in similar to 40% of the events. In individual CIRs the Fe/O ratio correlates strongly with the solar wind Fe/O ratio measured 2-4 days prior to the CIR passage. Taken together with previously reported observations of pick-up He in CIRs, these observations provide evidence that CIRs are accelerated out of a suprathermal ion pool of heated solar wind ions, pick-up ions, and remnant suprathermal ions from impulsive solar energetic particle (SEP) events.

引用

页码：101 / +

页数：2

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