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微波Ⅲ型爆发的观测特征
  • ISSN号：0001-5245
  • 期刊名称：《天文学报》
  • 时间：0
  • 分类：P162.11[天文地球—天文学] TM935.1[电气工程—电力电子与电力传动]
  • 作者机构：[1]中国科学院国家山天文台／云南天文台,云南650011, [2]不详
  • 相关基金：国家自然科学基金资助（10333030,10473020）
作者： 马媛[1,2], 谢瑞祥[1,2], 郑向明[1,2], 颜毅华[2]
关键词： 太阳, 射电辐射, 活动性, 微波Ⅲ型爆发
中文摘要：

统计分析了国家天文台2.6～3.8GHz高时间分辨率射电动态频谱仪在23周峰年期间（1998，4～2003，1）观测到的266个Ⅲ型爆发。对这些事件的频率漂移、持续时间、偏振、带宽、开始和结束频率做了详细分析。开始和结束频率的统计分析表明，开始频率在一个非常大的范围，从小于2．6GHz到大于3．8GHz，而结束频率的截止区相对集中，从2.82～3.76GHz。这些现象说明，电子加速的高度相当分散，在观测频率范围内具有正、负漂移率的Ⅲ型爆发数基本相等，这可能意味着被加速的向上和向下传播的电子束在2．6～3．8GHz范围内有相同的比例。统计结果表明，微波Ⅲ型爆发的辐射机制主要是等离子体辐射和电子回旋脉泽辐射过程。

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期刊信息
  • 《天文学报》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国天文学会 中国科学院紫金山天文台
  • 主编：甘为群
  • 地址：南京市栖霞区元化路8号
  • 邮编：210023
  • 邮箱：twxb@pmo.ac.cn
  • 电话：025-83332133
  • 国际标准刊号：ISSN：0001-5245
  • 国内统一刊号：ISSN：32-1113/P
  • 邮发代号:2-818
  • 获奖情况:
  • 1992年获中国科协优秀期刊三等奖,1996年获中国科学院优秀期刊三等奖,2000年获中国科协优秀期刊三等奖,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:1792