与日冕物质抛射(CME)相关的太阳微波发射

IF 0.5 Q4 PHYSICS, APPLIED Latvian Journal of Physics and Technical Sciences Pub Date : 2022-02-01 DOI:10.2478/lpts-2022-0002
J. Kallunki
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引用次数: 1

摘要

日冕物质抛射(CME)与射电暴之间的联系已经被发现,特别是在较低的频率(< 2ghz)。这项研究的目的是在四天的时间框架内,研究日冕物质抛射与37千兆赫(8毫米)射电亮度变化之间的可能联系。在芬兰阿尔托大学Metsähovi射电天文台的RT-14射电望远镜上进行了毫米射电观测。此外,分析中还包括11.2 GHz (2.7 cm)的太阳总通量信息。这些射电观测是在2011年3月至2017年9月期间进行的,总共包括24个事件。结果表明,在大多数情况下,射电增亮强度在CME发生前达到最大值。11.2 GHz强度出现时间与日冕物质抛射出现时间吻合,相差2 ~ 3小时。然而,在大多数情况下,在cme之前出现的最大强度为11.2 GHz。这项研究调查了基于毫米和厘米射电观测预测CME出现的可能性。该研究还提出了日冕物质抛射和太阳微波事件之间的情景联系。
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Solar Microwave Emission Associated with Coronal Mass Ejections (CME)
Abstract The connection between Coronal Mass Ejections (CME) and radio burst has been discovered especially at lower frequencies (< 2 GHz). The aim of the study is to investigate possible connection between CMEs and variability of radio brightenings at 37 GHz (8 mm) within the time frame of four days. The millimetre radio observations have been made on RT-14 radio telescope at Metsähovi Radio Observatory of Aalto University, Finland. In addition, 11.2 GHz (2.7 cm) total solar flux information is included in the analysis. The radio observations were made between March 2011 and September 2017, totally including 24 events. The results demonstrate that in most of the cases the radio brightening intensity achieves its maximum before CME occurs. Time of 11.2 GHz intensity appearance matches with time of CME appearance with difference of two to three hours. However, in most cases a maximum of 11.2 GHz intensity appears before CMEs. The study investigates a possibility of predicting CME appearance based on milli- and centimetre radio observations. The study also proposes a scenario connection between CMEs and solar microwave events.
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来源期刊
CiteScore
1.50
自引率
16.70%
发文量
41
审稿时长
5 weeks
期刊介绍: Latvian Journal of Physics and Technical Sciences (Latvijas Fizikas un Tehnisko Zinātņu Žurnāls) publishes experimental and theoretical papers containing results not published previously and review articles. Its scope includes Energy and Power, Energy Engineering, Energy Policy and Economics, Physical Sciences, Physics and Applied Physics in Engineering, Astronomy and Spectroscopy.
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