Energy and spectral analysis of confined solar flares from radio and X-ray observations

作     者：Cheng-Ming Tan Karl Ludwig Klein Yi-Hua Yan Satoshi Masuda Bao-Lin Tan Jing Huang Guo-Wu Yuan Cheng-Ming Tan;Karl Ludwig Klein;Yi-Hua Yan;Satoshi Masuda;Bao-Lin Tan;Jing Huang;Guo-Wu Yuan

作者机构：CAS Key Laboratory of Solar ActivityNational Astronomical Observatories of Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Observatoire de ParisLESIA&Station de radioastronomie de Nanc¸ayUniv.PSLCNRSSorbonne Univ.Univ.de ParisUniv.d’Orl´eans5 place Jules JanssenF-92190 MeudonFrance Institute for Space-Earth Environmental ResearchNagoya UniversityNagoya 464-8601Japan School of Information Science and EngineeringYunnan UniversityKunming 650091China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第11期

页      面：35-46页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the National Natural Science Foundation of China(NSFC,Grant Nos.11790301,11973057,11941003,11790305 and 61811530282) Chinese-French cooperation between CNRS and NSFC,the MOST(Grant No.2014FY120300) the National Key R&D Program of China(Grant No.2018YFA0404602) the International Partnership Program of Chinese Academy of Sciences(Grant No.183311KYSB20200003) the Application and Foundation Project of Yunnan Province(Grant No.202001BB050032) the Commission for Collaborating Research Program of CAS KLSA,NAOC(Grant No.KLSA202115) supported by ISSI-BJ supported by the international joint research program of the Institute for Space-Earth Environmental Research at Nagoya University and JSPS KAKENHI,grant No.JP18H01253 

主　　题：Sun:solar flare Sun:radio burst Sun:energy Sun:spectral 

摘      要：The energy and spectral shape of radio bursts may help us understand the generation mechanism of solar eruptions,including solar flares,coronal mass ejections,eruptive filaments,and various scales of *** different kinds of flares may have different characteristics of energy and spectral *** this work,we selected 10 mostly confined flare events during October 2014 to investigate their overall spectral behaviour and the energy emitted in microwaves by using radio observations from microwaves to interplanetary radio waves,and X-ray observations of GOES,RHESSI,and Fermi/*** found that:all the confined flare events were associated with a microwave continuum burst extending to frequencies of9.4~15.4 GHz,and the peak frequencies of all confined flare events are higher than 4.995 GHz and lower than or equal to 17 *** median value is around 9 *** microwave burst energy(or nuence)and the peak frequency are found to provide useful criteria to estimate the power of solar *** observations imply that the magnetic field in confined flares tends to be stronger than that in 412 flares studied by Nita et al.(2004).All 10 events studied did not produce detectable hard X-rays with energies above~300 keV indicating the lack of efficient acceleration of electrons to high energies in the confined flares.