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Observational evidence of very long period pulsations of solar coronal microwave radiation
Xie RX(谢瑞祥)1; Wang M(汪敏)1; Shi SB(施硕彪)1; Xu C(许春)1; Li WH(李维华)2; Yan, YH2; Sych, RA3; Altyntsev, AT3; Xie, RX (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
Source PublicationCHINESE ASTRONOMY AND ASTROPHYSICS
2003-04
Volume27Issue:2Pages:158-166
DOI10.1016/S0275-1062(03)00037-7
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun : Corona Sun : Radio Emission Sun : Oscillations
AbstractOn 1998 September 23, a rare event was observed with the microwave (1.0-2.0 GHz and 2.6-3.8 GHz) radio spectrograph of National Astronomical Observatories. It was a complex type-IV burst accompanied by multi-periodic pulsations, type-III bursts and type-I like noise storms. This paper focuses on the pulsation components with multiple long periods (about 7.3, 4.9, 3.7, 1.2 and 0.4 minutes). The pulsations may be due to standing waves in closed loops. Magnetohydrodynamic standing Alfven waves driven by the photospheric velocity field penetrate across the magnetic field, and this leads to the modulation of the radio radiation. These pulsations have downward motions, so it is not excluded that disturbances propagating in a closed or an open field structure may have caused the pulsations. The resonance of Alfven waves is concerned with the photospheric 5-minute oscillations, hence pulsations of very long periods may be assumed to come from driving sources in the photosphere. This can imply a possible mutual coupling between coronal magnetic loops and the photosphere.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0275-1062
URL查看原文
WOS IDWOS:000183228100006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSLOW MAGNETOACOUSTIC WAVES ; RADIO PULSATIONS ; OSCILLATIONS ; FLARE ; LOOPS ; REGION
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5609
Collection射电天文研究组
Corresponding AuthorXie, RX (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
3.Institute of Solar-Terrestrial Physics, 126 Lermontov St., Irkutsk 664033, Russia
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xie RX,Wang M,Shi SB,et al. Observational evidence of very long period pulsations of solar coronal microwave radiation[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2003,27(2):158-166.
APA Xie RX.,Wang M.,Shi SB.,Xu C.,Li WH.,...&Xie, RX .(2003).Observational evidence of very long period pulsations of solar coronal microwave radiation.CHINESE ASTRONOMY AND ASTROPHYSICS,27(2),158-166.
MLA Xie RX,et al."Observational evidence of very long period pulsations of solar coronal microwave radiation".CHINESE ASTRONOMY AND ASTROPHYSICS 27.2(2003):158-166.
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