arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2009.05755astro-ph.SR
收藏

低频太阳射电III型爆发的统计研究

A Statistical Study of Low-frequency Solar Radio Type-III Bursts

Mahender Aroori, K. Sasikumar Raja, R. Ramesh, Vemareddy Panditi, Christian Monstein, Yellaiah Ganji

摘要:

我们研究了2013 - 2017年期间使用位于印度Gauribidanur射电天文台的e-CALLISTO光谱仪观测到的低频(45 - 410 MHz)III型太阳射电爆发。在检查了1531次III型爆发后,我们发现426次爆发与耀斑有关,而其他爆发可能是由日冕中存在的小尺度特征/弱能量事件触发的。在这项研究中,我们对各种观测参数进行了统计分析,例如III型爆发的开始时间、频率下限和频率上限及其与耀斑的关联,以及这些参数与耀斑参数(例如位置、类别)的变化。开始和峰值时间。从这项研究中,我们发现,大多数的高频爆发(其上限频率的截止$> 350$ MHz)起源于西部的安第斯山脉。我们解释说,这可能是由于帕克螺旋从这些彗星是针对地球和高频率的爆发是更直接的事实。此外,我们报告说,从西半球到达地球的爆发数量高于东半球。

英文摘要:

We have studied low-frequency (45 - 410 MHz) type III solar radio bursts observed using the e-CALLISTO spectrometer located at Gauribidanur radio observatory, India during 2013 - 2017. After inspecting the 1531 type III bursts we found that 426 bursts were associated with flares, while the other bursts might have triggered by small scale features / weak energy events present in the solar corona. In this study, we have carried out a statistical analysis of various observational parameters like start time, lower and upper-frequency cut-offs of type III bursts and their association with flares, variation of such parameters with flare parameters such as location, class, onset and peak timings. From this study, we found that most of the high-frequency bursts (whose upper-frequency cut-off $> 350$ MHz) are originated from the western longitudes. We interpret that it could be due to the fact that Parker spirals from these longitudes are directed towards the earth and high-frequency bursts are more directive. Further, we report that number of bursts that reach earth from western longitudes are higher than eastern longitudes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑