Study of Solar Energetic Particle Events with Ulysses, ACE Observations and Numerical Simulations

Author:

Lian Lele1ORCID,Qin Gang1ORCID,Wang Yang1,Cui Shuwang2

Affiliation:

1. School of Science, Harbin Institute of Technology, Shenzhen 518055, China

2. College of Physics, Hebei Normal University, Shijiazhuang 050024, China

Abstract

We study the latitudinal extent of the near-relativistic electron events of 10 June 2000 and 26 December 2001, observed by both Ulysses and ACE. From the observations it is shown that the intensity of ACE was quite different from that of Ulysses. Through the numerical simulations, we obtain the SEPs time-intensity profiles, which generally fit well to the observations. To compare the observations we obtained the best fit parameters for the simulations. We suggest that the transport effects, especially the perpendicular diffusion effect, can cause the difference between the intensity profiles of ACE and Ulysses, which is dominated by particle transport at a large radial distance and high-latitude when a spacecraft has poor magnetic connection to the particle source. Furthermore, we present the particle source from the best fit parameters to show that the start and peak times of the particle sources are between the onset and max times of a flare in all the energy channels. Moreover, we propose models for the peak intensity and half width of the particle source, and the time interval from the flare onset to the particle source peak time. We show that the models generally agree with the best fit parameters.

Funder

Natural Science Foundation of China

Publisher

MDPI AG

Subject

Materials Chemistry,Chemistry (miscellaneous),Electronic, Optical and Magnetic Materials

Reference120 articles.

1. Solar energetic particles: A paradigm shift;Reames;Rev. Geophys.,1995

2. Particle acceleration at the Sun and in the heliosphere;Reames;Space Sci. Rev.,1999

3. Two components in major solar particle events;Cane;Geophys. Res. Lett.,2003

4. The acceleration characteristics of solar energetic particles in the 2000 July 14 event;Li;Astron. Astrophys.,2007

5. A study of solar energetic particle events of 1997-2006: Their composition and associations;Cane;J. Geophys. Res.,2010

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3