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Determination of the lifetime of high-l solar p-modes from the interaction of p-mode waves with sunspots
Chen, KR; Chou, DY; Sun, MT; Huang, TY; Jimenez, A; Lai, SP; Mu, TM; Chi, PJ; Ou, KT; Wang, CC; Lu, JY; Lin, YC; Chu, AL; Niu, CS; Chou, YP; Chao, H; RabelloSoares, MC; Ai, GX; Wang, GP; Zirin, H; Marquette, W; Nenow, J
1996-07-10
Source PublicationASTROPHYSICAL JOURNAL
Volume465Issue:2Pages:985-993
AbstractWe use the absorption of the solar p-mode waves in sunspots as a tool to determine the lifetime of the p-modes in the range l = 200-700. We measure the absorption coefficients of the p-modes of the sunspots with the helioseismology data taken by the Taiwan Oscillation Network and find that the absorption coefficients of all five sunspots decrease with the distance from the annular region, used to compute the absorption coefficients, to the central sunspot. This decrease of the absorption coefficients is interpreted as the effect of the finite p-mode lifetime. The measured absorption coefficients of the sunspot regions become negative when the distance from the annular region to the central sunspot is large. This phenomenon is also found in a quiet region. We interpret this phenomenon in two different ways: the effective acoustic emission and the observational center-to-limb effect. We set up two simple models to relate the p-mode lifetime and effective emission strength to the measured absorption coefficient. By fitting the measured absorption coefficient versus distance to the models, we obtain the lifetime and the strength of the effective acoustic emission for the modes in the range l = 200-700. The measured p-mode lifetimes decrease with l and the frequency.
KeywordSunspots Sun Waves Oscillations
Indexed BySCI
Language英语
WOS IDWOS:A1996UV06300049
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8106
Collection院士
Affiliation1.CHANG GUNG COLL MED & TECHNOL,DEPT MECH ENGN,KWEI SAN,TAIWAN
2.INST ASTROFIS CANARIAS,OBSERV TIEDE,TENERIFE,SPAIN
3.LIEN HO JR COLL TECHNOL,DEPT ELECTRO OPT ENGN,MAIOLI 36012,TAIWAN
4.BEIJING ASTRON OBSERV,HUAIROU SOLAR OBSERV STN,BEIJING,PEOPLES R CHINA
5.CALTECH,BIG BEAR SOLAR OBSERV,PASADENA,CA 91125
Recommended Citation
GB/T 7714
Chen, KR,Chou, DY,Sun, MT,et al. Determination of the lifetime of high-l solar p-modes from the interaction of p-mode waves with sunspots[J]. ASTROPHYSICAL JOURNAL,1996,465(2):985-993.
APA Chen, KR.,Chou, DY.,Sun, MT.,Huang, TY.,Jimenez, A.,...&Nenow, J.(1996).Determination of the lifetime of high-l solar p-modes from the interaction of p-mode waves with sunspots.ASTROPHYSICAL JOURNAL,465(2),985-993.
MLA Chen, KR,et al."Determination of the lifetime of high-l solar p-modes from the interaction of p-mode waves with sunspots".ASTROPHYSICAL JOURNAL 465.2(1996):985-993.
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