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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.
发表期刊CHINESE ASTRONOMY AND ASTROPHYSICS
2003-04
卷号27期号:2页码:158-166
DOI10.1016/S0275-1062(03)00037-7
产权排序第1完成单位
收录类别SCI
关键词Sun : Corona Sun : Radio Emission Sun : Oscillations
摘要On 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0275-1062
URL查看原文
WOS记录号WOS:000183228100006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SLOW MAGNETOACOUSTIC WAVES ; RADIO PULSATIONS ; OSCILLATIONS ; FLARE ; LOOPS ; REGION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5609
专题射电天文研究组
通讯作者Xie, RX (reprint author), Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China.
作者单位1.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
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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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