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Decimetric Emission 500 '' Away from a Flaring Site: Possible Scenarios from GMRT Solar Radio Observations
Bisoi, Susanta Kumar1; Sawant, H. S.2; Janardhan, P.3; Yan, Y.1; Chen, L.1; Awasthi, Arun Kumar4; Srivastava, Shweta3; Gao GN(高冠男)5; Bisoi, Susanta Kumar, Email: susanta@nao.cas.cn
发表期刊ASTROPHYSICAL JOURNAL
2018-07-20
卷号862期号:1
DOI10.3847/1538-4357/aacd07
产权排序第5完成单位
收录类别SCI
关键词Sun: Flares Sun: Particle Emission Sun: Radio Radiation
摘要We present a study of decimetric radio activity using the first high time cadence (0.5 s) images from the Giant Meterwave Radio Telescope (GMRT) at 610 MHz associated with GOES C1.4- and M1.0-class solar flares and a coronal mass ejection (CME) onset that occurred on 2015 June 20. The high spatial resolution images from GMRT show a strong radio source during the C1.4 flare located similar to 500 '' away from the flaring site with no corresponding bright footpoints or coronal features nearby. In contrast, however, strong radio sources are found near the flaring site during the M1.0 flare and around the CME onset time. Weak radio sources located near the flaring site are also found during the maximum of the C1.4 flare activity that show a temporal association with metric Type III bursts identified by the Solar Broadband Radio Spectrometer at Yunnan Astronomical Observatory. Based on a multiwavelength analysis and magnetic potential field source surface extrapolations, we suggest that the source electrons of GMRT radio sources and metric Type III bursts originated from a common electron acceleration site. We also show that the strong GMRT radio source is generated by a coherent emission process, and its apparent location far from the flaring site is possibly due to the wave-ducting effect.
项目资助者PIFI program of the Chinese Academy of Sciences(2015PM066) ; NSFC(117550110422, 11573043, 1143306, 11403099)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000439868000002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SLOWLY DRIFTING STRUCTURES ; CORONAL MASS EJECTIONS ; PARTICLE-ACCELERATION ; ELECTRON ACCELERATION ; MAGNETIC-FIELD ; X-RAY ; FLARES ; BURSTS ; FREQUENCY ; TELESCOPE
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17384
专题射电天文研究组
通讯作者Bisoi, Susanta Kumar, Email: susanta@nao.cas.cn
作者单位1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
2.INPE—National Institute for Space Research, Sao Jose dos Campos, SP, Brazil
3.Astronomy & Astrophysics Division, Physical Research Laboratory, Ahmedabad 380 009, India
4.Key Laboratory of Geospace Environment, Department of Geophysical and Planetary Sciences, University of Science and Technology of China, Hefei 230026, People's Republic of China
5.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
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Bisoi, Susanta Kumar,Sawant, H. S.,Janardhan, P.,et al. Decimetric Emission 500 '' Away from a Flaring Site: Possible Scenarios from GMRT Solar Radio Observations[J]. ASTROPHYSICAL JOURNAL,2018,862(1).
APA Bisoi, Susanta Kumar.,Sawant, H. S..,Janardhan, P..,Yan, Y..,Chen, L..,...&Bisoi, Susanta Kumar, Email: susanta@nao.cas.cn.(2018).Decimetric Emission 500 '' Away from a Flaring Site: Possible Scenarios from GMRT Solar Radio Observations.ASTROPHYSICAL JOURNAL,862(1).
MLA Bisoi, Susanta Kumar,et al."Decimetric Emission 500 '' Away from a Flaring Site: Possible Scenarios from GMRT Solar Radio Observations".ASTROPHYSICAL JOURNAL 862.1(2018).
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