KMS of Xinjiang Astronomical Observatory, CAS
| Parametric Evolution of Power-law Energy Spectra of Flare Accelerated Electrons in the Solar Atmosphere | |
Tang, J. F.1,2,3 ; Wu, D. J.2; Chen, L.2; Xu, L.4; Tan, B. L.3
| |
| 2020-11-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| ISSN | 0004-637X |
| Volume | 904Issue:1Pages:1 |
| Contribution Rank | 1 |
| Abstract | It is well known that solar hard X-ray bursts (HXRs) and solar radio bursts (SRBs) from solar flares both are produced directly by fast electron beams (FEBs) traveling through the solar atmosphere. The observed characteristics of HXRs and SRBs sensitively depend on the energy distribution of FEBs, which are believed commonly to have a power-law energy spectrum. When FEBs propagating in the solar atmosphere, however, their energy spectra can considerably vary due to the interaction with the atmospheric plasmas and this may significantly influence the observational characteristics of the producing HXRs and SRBs. In the present paper, based on flare atmospheric models, we investigate the parametric evolution of power-law spectra of FEBs due to their energy losses when propagating along flaring loops. The results show that an initially single power-law spectrum with a lower-energy cutoff can evolve into a more complex double power-law spectrum or a broken power-law spectrum with multi-breaking knees because of the dependence of the energy loss on the initial energies. The possible effects of the energy-spectral evolution of FEBs on observational characteristics of their HXR flares and SRBs are discussed. The present results are helpful to understand the physics of dynamical spectra of HXRs and SRBs from solar flares. |
| Keyword | Spectral energy distribution Solar x-ray flares Solar coronal loops Solar energetic particles |
| DOI | 10.3847/1538-4357/abc2ca |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | HARD X-RAY ; PARTICLE-ACCELERATION ; NONTHERMAL ELECTRONS ; IMPULSIVE PHASE ; EMISSION ; TARGET ; IONIZATION ; RADIO ; BEAMS ; BREMSSTRAHLUNG |
| Funding Project | NSFC[11673055] ; NSFC[41531071] ; NSFC[11873018] ; NSFC[11773601] ; Tianshan Youth[2017Q401] ; Key Laboratory of Solar Activity at National Astronomical Observatories, CAS ; [2018-XBQNXZ-A-009] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000590134400001 |
| Publisher | IOP PUBLISHING LTD |
| Funding Organization | NSFC ; Tianshan Youth ; Key Laboratory of Solar Activity at National Astronomical Observatories, CAS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3720 |
| Collection | 太阳物理研究团组 |
| Corresponding Author | Tang, J. F.; Wu, D. J. |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 4.Shangrao Normal Univ, Sch Phys & Elect Informat, Shangrao 334001, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Tang, J. F.,Wu, D. J.,Chen, L.,et al. Parametric Evolution of Power-law Energy Spectra of Flare Accelerated Electrons in the Solar Atmosphere[J]. ASTROPHYSICAL JOURNAL,2020,904(1):1. |
| APA | Tang, J. F.,Wu, D. J.,Chen, L.,Xu, L.,&Tan, B. L..(2020).Parametric Evolution of Power-law Energy Spectra of Flare Accelerated Electrons in the Solar Atmosphere.ASTROPHYSICAL JOURNAL,904(1),1. |
| MLA | Tang, J. F.,et al."Parametric Evolution of Power-law Energy Spectra of Flare Accelerated Electrons in the Solar Atmosphere".ASTROPHYSICAL JOURNAL 904.1(2020):1. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Tang-2020-Parametric（1968KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment