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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
Source PublicationASTROPHYSICAL JOURNAL
2018-07-20
Volume862Issue:1
DOI10.3847/1538-4357/aacd07
Contribution Rank第5完成单位
Indexed BySCI
KeywordSun: Flares Sun: Particle Emission Sun: Radio Radiation
Abstract

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.

Funding ProjectPIFI program of the Chinese Academy of Sciences[2015PM066] ; NSFC[117550110422] ; NSFC[11573043] ; NSFC[1143306] ; NSFC[11403099]
Funding OrganizationPIFI program of the Chinese Academy of Sciences[2015PM066] ; NSFC[117550110422, 11573043, 1143306, 11403099]
Language英语
Subject Area天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000439868000002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSlowly Drifting Structures ; Coronal Mass Ejections ; Particle-acceleration ; Electron Acceleration ; Magnetic-field ; X-ray ; Flares ; Bursts ; Frequency ; Telescope
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/17384
Collection射电天文研究组
Corresponding AuthorBisoi, Susanta Kumar
Affiliation1.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
Recommended Citation
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).
APA Bisoi, Susanta Kumar.,Sawant, H. S..,Janardhan, P..,Yan, Y..,Chen, L..,...&Gao GN.(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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