NAOC Open IR
Observations of EUV and soft X-ray recurring jets in an active region
Yang Liheng1; Jiang Yunchan2; Yang Jiayun2; Bi Yi2; Zheng Ruisheng2; Hong Junchao2
2011
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume11Issue:10Pages:1229
AbstractWe present simultaneous observations of three recurring jets in EUV and soft X-ray (SXR), which occurred in an active region on 2007 June 5. By comparing their morphological and kinematic characteristics in these two different wavelengths, we found that EUV and SXR jets had similar locations, directions, sizes and velocities. We also analyzed their spectral properties by using six spectral lines from the EUV Imaging Spectrometer (EIS) onboard Hinode and found that these jets had temperatures from 0.05 to 2.0 MK and maximum electron densities from 6.6×109 to 3.4×1010 cm-3. For each jet, an elongated blue-shifted component and a red-shifted component at the jet base were simultaneously observed in the Fe XII λ195 and the He II λ256 lines. The three jets had maximum Doppler velocities from 25 to 121 km s-1 in the Fe XII λ195 line and from 115 to 232 km s-1 in the He II λ256 line. They had maximum non-thermal velocities from 98 to 181 km s-1 in the Fe XII λ195 line and from 196 to 399 km s-1 in the He II λ256 line. We also examined the relationship between averaged Doppler velocities and maximum ionization temperatures of these three jets and found that averaged Doppler velocities decreased with the increase of maximum ionization temperatures. In the photosphere, magnetic flux emergences and cancelations continuously took place at the jet base. These observational results were consistent with the magnetic reconnection jet model, implying that magnetic reconnection between emerging magnetic flux and ambient magnetic field occurred in the lower atmosphere.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/41914
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang Liheng,Jiang Yunchan,Yang Jiayun,et al. Observations of EUV and soft X-ray recurring jets in an active region[J]. Research in Astronomy and Astrophysics,2011,11(10):1229.
APA Yang Liheng,Jiang Yunchan,Yang Jiayun,Bi Yi,Zheng Ruisheng,&Hong Junchao.(2011).Observations of EUV and soft X-ray recurring jets in an active region.Research in Astronomy and Astrophysics,11(10),1229.
MLA Yang Liheng,et al."Observations of EUV and soft X-ray recurring jets in an active region".Research in Astronomy and Astrophysics 11.10(2011):1229.
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