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Decimetric Emission 500 '' Away from a Flaring Site: Possible Scenarios from GMRT Solar Radio Observations

文献类型：期刊论文

作者Bisoi, Susanta Kumar1; Sawant, H. S.2; Janardhan, P.3; Yan, Y.1; Chen, L.1; Awasthi, Arun Kumar4; Srivastava, Shweta3; Gao, G.5
刊名ASTROPHYSICAL JOURNAL
出版日期2018-07-20
卷号862期号:1页码:15
ISSN号0004-637X
关键词Sun: flares Sun: particle emission Sun: radio radiation
DOI10.3847/1538-4357/aacd07
英文摘要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.
WOS关键词SLOWLY DRIFTING STRUCTURES ; CORONAL MASS EJECTIONS ; PARTICLE-ACCELERATION ; ELECTRON ACCELERATION ; MAGNETIC-FIELD ; X-RAY ; FLARES ; BURSTS ; FREQUENCY ; TELESCOPE
资助项目PIFI program of the Chinese Academy of Sciences[2015PM066] ; NSFC[117550110422] ; NSFC[11573043] ; NSFC[1143306] ; NSFC[11403099]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000439868000002
资助机构PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC
源URL[http://ir.bao.ac.cn/handle/114a11/22265]  
专题中国科学院国家天文台
通讯作者Bisoi, Susanta Kumar
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
2.INPE Natl Inst Space Res, Sao Jose Dos Campos, SP, Brazil
3.Phys Res Lab, Astron & Astrophys Div, Ahmadabad 380009, Gujarat, India
4.Univ Sci & Technol China, Dept Geophys & Planetary Sci, Key Lab Geospace Environm, Hefei 230026, Anhui, Peoples R China
5.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
推荐引用方式
GB/T 7714		 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):15.
APA Bisoi, Susanta Kumar.,Sawant, H. S..,Janardhan, P..,Yan, Y..,Chen, L..,...&Gao, G..(2018).Decimetric Emission 500 '' Away from a Flaring Site: Possible Scenarios from GMRT Solar Radio Observations.ASTROPHYSICAL JOURNAL,862(1),15.
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):15.

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