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On the time evolution of brightness, volume and height of a coronal source in an M-class flare
Firoz, Kazi A.1,2; Gan, W. Q.1; Li, Y. P.1; Rodriguez-Pacheco, J.2; Su, Y.1
2017-07-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume362Issue:6Pages:10
Corresponding AuthorFiroz, Kazi A.(kazifiroz2002@gmail.com)
AbstractWe study brightness, volume and heights of the X-ray thermal emission components for an M-class solar flare on 17 May 2012. Based on the RHESSI data availability, we present the results for 01:42-01:58 UT over the lateflare phase. It is observed that the spatial evolution of the thermal emission components 6-12 and 12-18 keV are well associated with the hottest plasma in the corona. Results show that the ascending height (similar to 1.35x10(4) km) and speed (similar to 14.0 kms(-1)) of coronal source component 6-12 keV is slightly smaller than the ascending height (similar to 1.45x10(4) km) and speed (similar to 15.1 kms(-1)) of the coronal source component 12-18 keV. Mean flux intensity (I-mean) of the 6-12 keV maintained a good fit (chi(2) = 0.41) with the corresponding volume (V) following strongly the power law [I-mean = (15.8 +/- 0.21) V-1.28 +/- 0.03]. In contrast, the 12-18 keV maintained a weak fit (chi(2) = 2.37) following still the power law [I-mean = (0.19 +/- 0.01) V-1.88 +/- 0.16]. The power law indices (-1.28 +/- 0.03;-1.88 +/- 0.16) obtained by the observational analysis slightly differ from the power law index (-1.67) obtained by a theoretical model. The observations are consistent with adiabatic expansion of the coronal source component.
KeywordSolar flares Area/volume of the flare Volume and mean intensity Heights of the coronal sources Total Thermal electrons in high-temperature plasma in the corona contribution into the flare process Adiabatic expansion Theoretical model for thermal source RHESSI X-ray GOES X-ray SDO/AIA images Spatial and temporal evolution of the coronal source RHESSI image reconstruction algorithm
DOI10.1007/s10509-017-3092-1
WOS KeywordHARD X-RAY ; SOLAR-FLARES ; MAGNETIC RECONNECTION ; PARTICLE-ACCELERATION ; CHROMOSPHERIC EVAPORATION ; GLOBAL ENERGETICS ; FREQUENCY-DISTRIBUTIONS ; NONTHERMAL ELECTRONS ; RHESSI OBSERVATIONS ; MASS EJECTIONS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000404219200008
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22974
Collection中国科学院紫金山天文台
Corresponding AuthorFiroz, Kazi A.
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Alcala De Henares, Space Res Grp, Alcala De Henares 28801, Spain
Recommended Citation
GB/T 7714
Firoz, Kazi A.,Gan, W. Q.,Li, Y. P.,et al. On the time evolution of brightness, volume and height of a coronal source in an M-class flare[J]. ASTROPHYSICS AND SPACE SCIENCE,2017,362(6):10.
APA Firoz, Kazi A.,Gan, W. Q.,Li, Y. P.,Rodriguez-Pacheco, J.,&Su, Y..(2017).On the time evolution of brightness, volume and height of a coronal source in an M-class flare.ASTROPHYSICS AND SPACE SCIENCE,362(6),10.
MLA Firoz, Kazi A.,et al."On the time evolution of brightness, volume and height of a coronal source in an M-class flare".ASTROPHYSICS AND SPACE SCIENCE 362.6(2017):10.
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