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Small-scale oscillations in a quiescent prominence observed by HINODE/SOT Prominence oscillations
Ning, Z1; Cao, W2; Okamoto, TJ3; Ichimoto, K3,4; Qu ZQ(屈中权)5; Ning, Z (reprint author), Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China.
Source PublicationASTRONOMY & ASTROPHYSICS
2009-05
Volume499Issue:2Pages:595-600
DOI10.1051/0004-6361/200810853
Contribution Rank第5完成单位
Indexed BySCI ; EI
KeywordSun: Corona Sun: Prominences Sun: Oscillations
AbstractContext. Investigations of the behavior of small-scale threads can provide an alternative approach to studying prominence dynamics and understanding its origin and nature. Aims. The behavior of threads are analyzed in a quiescent prominence, including drifting and both the horizontally and vertically oscillating motions. These indicate waves in the solar prominence. Methods. We used the Ha images at a setting wavelength of +0.076 angstrom. A quiescent prominence was observed by HINODE/SOT on 2008 January 15 for about 3 h in total. Results. Consistent with previous findings, prominences show numerous thread-like structures. Some threads clearly exhibit both vertically and horizontally oscillatory motions, while others are only drifting. Complicated cases show both drifting and oscillatory motions simultaneously. In the upper part of the prominence, the threads are oscillating independently of each other. We find that three threads oscillate with the same phase for at least two periods. The oscillations seem to be strongly damped since they disappear after a few periods. The maximum number of observed periods is 8 in our observations. In the lower part of the prominence, however, the different threads have a mixed character with the individual oscillatory motions unstable for one entire period. Most oscillatory motions will disappear after a half period or less, while the new oscillatory motions are excited nearby. A 5-min period is predominant, and the oscillating amplitudes show an average value of +/- 3.5 km s(-1). We find some upflows in the spicule layer, and they appear to transport the mass from photosphere ( or spicules themselves) to the prominence. These upflows have an average velocity amplitude of 0.8 km s(-1). Conclusions. The threads exhibit three distinct behaviors. The first is only drifting, the second is typically oscillating, and the third shows both characteristics. There are no substantial differences between the periods of horizontally and vertically oscillating threads in this prominence.
Funding OrganizationNSF [ATM-0847126, ATM-0745744] ; NASA [NASA-NNX08BA22G] ; NSF of China [10603014, 10843005, 10833007] ; 973 Program [2006CB806302] ; CAS [KJCX2-YW-T04]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6361
URL查看原文
WOS IDWOS:000266730500023
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSOLAR OPTICAL TELESCOPE ; FAST MAGNETOHYDRODYNAMIC OSCILLATIONS ; LARGE-AMPLITUDE OSCILLATION ; POLAR CROWN FILAMENT ; TRANSITION REGION ; NETWORK OSCILLATIONS ; SUMER OBSERVATIONS ; OUTER ATMOSPHERE ; MHD OSCILLATIONS ; FINE-STRUCTURES
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6137
Collection太阳物理研究组
Corresponding AuthorNing, Z (reprint author), Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China.
Affiliation1.Purple Mountain Observatory, Nanjing 210008, PR China
2.Center for Solar Terrestrial Research, New Jersey Institute of Technology, Newark, NJ 07102, USA
3.National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan
4.Kwasan and Hida Observatories, Kyoto University, Yamashina, Kyoto 607-8471, Japan
5.Yunnan Astronomy Observatory, Kunming 650011, PR China
Recommended Citation
GB/T 7714
Ning, Z,Cao, W,Okamoto, TJ,et al. Small-scale oscillations in a quiescent prominence observed by HINODE/SOT Prominence oscillations[J]. ASTRONOMY & ASTROPHYSICS,2009,499(2):595-600.
APA Ning, Z,Cao, W,Okamoto, TJ,Ichimoto, K,Qu ZQ,&Ning, Z .(2009).Small-scale oscillations in a quiescent prominence observed by HINODE/SOT Prominence oscillations.ASTRONOMY & ASTROPHYSICS,499(2),595-600.
MLA Ning, Z,et al."Small-scale oscillations in a quiescent prominence observed by HINODE/SOT Prominence oscillations".ASTRONOMY & ASTROPHYSICS 499.2(2009):595-600.
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