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Observations of Running Penumbral Waves Emerging in a Sunspot
Priya, T. G.1,2; Cao Wenda3; Su Jiangtao1,2; Chen Jie1; Mao Xinjie1,4; Deng Yuanyong1,2; Robert, Erdelyi5,6
2018
Source PublicationASTROPHYSICAL JOURNAL
Volume852Issue:1
AbstractWe present results from the investigation of 5 minute umbral oscillations in a single-polarity sunspot of active region NOAA 12132. The spectra of TiO, H alpha, and 304 angstrom are used for corresponding atmospheric heights from the photosphere to lower corona. Power spectrum analysis at the formation height of H alpha - 0.6 angstrom to the Ha center resulted in the detection of 5 minute oscillation signals in intensity interpreted as running waves outside the umbral center, mostly with vertical magnetic field inclination > 15 degrees. A phase-speed filter is used to extract the running wave signals with speed v(ph) >. 4 km s(-1), from the time series of H alpha - 0.4 angstrom images, and found twenty-four 3 minute umbral oscillatory events in a duration of one hour. Interestingly, the initial emergence of the 3 minute umbral oscillatory events are noticed closer to or at umbral boundaries. These 3 minute umbral oscillatory events are observed for the first time as propagating from a fraction of preceding running penumbral waves (RPWs). These fractional wavefronts rapidly separate from RPWs and move toward the umbral center, wherein they expand radially outwards suggesting the beginning of a new umbral oscillatory event. We found that most of these umbral oscillatory events develop further into RPWs. We speculate that the waveguides of running waves are twisted in spiral structures and hence the wavefronts are first seen at high latitudes of umbral boundaries and later at lower latitudes of the umbral center.
SubtypeArticle
KeywordSun: Chromosphere Magnetic Fields Sunspots
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Basic Research Program of China(11427901 ; National Basic Research Program of China(11427901 ; NJIT ; NJIT ; US NSF(AGS-1250818) ; US NSF(AGS-1250818) ; NASA(NNX13AG14G) ; NASA(NNX13AG14G) ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of CAS ; strategic priority research program of CAS ; CAS-TWAS Presidents PhD fellowship ; CAS-TWAS Presidents PhD fellowship ; (2016VMA045) ; (2016VMA045) ; 11773038 ; 11773038 ; 11373040 ; 11373040 ; 11303052 ; 11303052 ; 11303048) ; 11303048) ; National Basic Research Program of China(11427901 ; National Basic Research Program of China(11427901 ; NJIT ; NJIT ; US NSF(AGS-1250818) ; US NSF(AGS-1250818) ; NASA(NNX13AG14G) ; NASA(NNX13AG14G) ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of CAS ; strategic priority research program of CAS ; CAS-TWAS Presidents PhD fellowship ; CAS-TWAS Presidents PhD fellowship ; (2016VMA045) ; (2016VMA045) ; 11773038 ; 11773038 ; 11373040 ; 11373040 ; 11303052 ; 11303052 ; 11303048) ; 11303048)
DOI10.3847/1538-4357/aa9c47
WOS KeywordUMBRAL OSCILLATIONS ; PHOTOSPHERIC OSCILLATIONS ; MAGNETOACOUSTIC WAVES ; CHROMOSPHERIC SUNSPOT ; TIME-SERIES ; SOLAR ; VELOCITY ; ASSOCIATION
Indexed BySCI
Language英语
Funding OrganizationNational Basic Research Program of China(11427901 ; National Basic Research Program of China(11427901 ; NJIT ; NJIT ; US NSF(AGS-1250818) ; US NSF(AGS-1250818) ; NASA(NNX13AG14G) ; NASA(NNX13AG14G) ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of CAS ; strategic priority research program of CAS ; CAS-TWAS Presidents PhD fellowship ; CAS-TWAS Presidents PhD fellowship ; (2016VMA045) ; (2016VMA045) ; 11773038 ; 11773038 ; 11373040 ; 11373040 ; 11303052 ; 11303052 ; 11303048) ; 11303048) ; National Basic Research Program of China(11427901 ; National Basic Research Program of China(11427901 ; NJIT ; NJIT ; US NSF(AGS-1250818) ; US NSF(AGS-1250818) ; NASA(NNX13AG14G) ; NASA(NNX13AG14G) ; Korea Astronomy and Space Science Institute ; Korea Astronomy and Space Science Institute ; Seoul National University ; Seoul National University ; strategic priority research program of CAS ; strategic priority research program of CAS ; CAS-TWAS Presidents PhD fellowship ; CAS-TWAS Presidents PhD fellowship ; (2016VMA045) ; (2016VMA045) ; 11773038 ; 11773038 ; 11373040 ; 11373040 ; 11303052 ; 11303052 ; 11303048) ; 11303048)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000419103300004
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/20339
Collection太阳物理研究部
Affiliation1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
3.Big Bear Solar Observ, 40386 North Shore Lane, Big Bear City, CA 92314 USA
4.Beijing Normal Univ, 19 XinJieKouWai St, Beijing 100875, Peoples R China
5.Univ Sheffield, Sch Math & Stat, Solar Phys & Space Plasma Res Ctr, Hicks Bldg,Hounsfield Rd,POB 32, Sheffield S3 7RH, S Yorkshire, England
6.Eotvos Lorand Univ, Dept Astron, Pazmany P Setany 1-A, H-1518 Budapest, Hungary
Recommended Citation
GB/T 7714
Priya, T. G.,Cao Wenda,Su Jiangtao,et al. Observations of Running Penumbral Waves Emerging in a Sunspot[J]. ASTROPHYSICAL JOURNAL,2018,852(1).
APA Priya, T. G..,Cao Wenda.,Su Jiangtao.,Chen Jie.,Mao Xinjie.,...&Robert, Erdelyi.(2018).Observations of Running Penumbral Waves Emerging in a Sunspot.ASTROPHYSICAL JOURNAL,852(1).
MLA Priya, T. G.,et al."Observations of Running Penumbral Waves Emerging in a Sunspot".ASTROPHYSICAL JOURNAL 852.1(2018).
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