Flow around sunspots from p-mode frequency shift measurements

Ming Tsung Sun; Dean Yi Chou; Chia Hsien Lin; Tao Mo Mu; Said Loudagh; B. Bala; I. Jen Huang; Antonio Jimenez; Maria Cristina Rabello-Soares; Guoxiang Ai; Gwo Ping Wang; Harold Zirin; William Marquette; Shuhrat Ehgamberdiev; Shukur Khalikov

doi:10.1023/A:1004927811123

Flow around sunspots from p-mode frequency shift measurements

Ming Tsung Sun^*, Dean Yi Chou, Chia Hsien Lin, Tao Mo Mu, Said Loudagh, B. Bala, I. Jen Huang, Antonio Jimenez, Maria Cristina Rabello-Soares, Guoxiang Ai, Gwo Ping Wang, Harold Zirin, William Marquette, Shuhrat Ehgamberdiev, Shukur Khalikov

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Contribution to journal › Journal Article › peer-review

5 Scopus citations

Abstract

We use five-day helioseimic data from the Taiwan Oscillation Network to study the flow around a sunspot, NOAA 7887. The p-mode oscillations in an annular region centered at the sunspot are decomposed into the modes propagating toward and away from the sunspot. We find that the frequency of an outgoing mode is greater than that of the corresponding incoming mode. This indicates that the plasma is flowing outward from the sunspot. The outflow velocity is estimated to be about 40-80 m s^-1.

Original language	English
Pages (from-to)	59-65
Number of pages	7
Journal	Solar Physics
Volume	176
Issue number	1
DOIs	https://doi.org/10.1023/A:1004927811123
State	Published - 1997

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title = "Flow around sunspots from p-mode frequency shift measurements",

abstract = "We use five-day helioseimic data from the Taiwan Oscillation Network to study the flow around a sunspot, NOAA 7887. The p-mode oscillations in an annular region centered at the sunspot are decomposed into the modes propagating toward and away from the sunspot. We find that the frequency of an outgoing mode is greater than that of the corresponding incoming mode. This indicates that the plasma is flowing outward from the sunspot. The outflow velocity is estimated to be about 40-80 m s-1.",

author = "Sun, {Ming Tsung} and Chou, {Dean Yi} and Lin, {Chia Hsien} and Mu, {Tao Mo} and Said Loudagh and B. Bala and Huang, {I. Jen} and Antonio Jimenez and Rabello-Soares, {Maria Cristina} and Guoxiang Ai and Wang, {Gwo Ping} and Harold Zirin and William Marquette and Shuhrat Ehgamberdiev and Shukur Khalikov",

year = "1997",

doi = "10.1023/A:1004927811123",

language = "英语",

volume = "176",

pages = "59--65",

journal = "Solar Physics",

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T1 - Flow around sunspots from p-mode frequency shift measurements

AU - Sun, Ming Tsung

AU - Chou, Dean Yi

AU - Lin, Chia Hsien

AU - Mu, Tao Mo

AU - Loudagh, Said

AU - Bala, B.

AU - Huang, I. Jen

AU - Jimenez, Antonio

AU - Rabello-Soares, Maria Cristina

AU - Ai, Guoxiang

AU - Wang, Gwo Ping

AU - Zirin, Harold

AU - Marquette, William

AU - Ehgamberdiev, Shuhrat

AU - Khalikov, Shukur

PY - 1997

Y1 - 1997

N2 - We use five-day helioseimic data from the Taiwan Oscillation Network to study the flow around a sunspot, NOAA 7887. The p-mode oscillations in an annular region centered at the sunspot are decomposed into the modes propagating toward and away from the sunspot. We find that the frequency of an outgoing mode is greater than that of the corresponding incoming mode. This indicates that the plasma is flowing outward from the sunspot. The outflow velocity is estimated to be about 40-80 m s-1.

AB - We use five-day helioseimic data from the Taiwan Oscillation Network to study the flow around a sunspot, NOAA 7887. The p-mode oscillations in an annular region centered at the sunspot are decomposed into the modes propagating toward and away from the sunspot. We find that the frequency of an outgoing mode is greater than that of the corresponding incoming mode. This indicates that the plasma is flowing outward from the sunspot. The outflow velocity is estimated to be about 40-80 m s-1.

UR - http://www.scopus.com/inward/record.url?scp=0031313099&partnerID=8YFLogxK

U2 - 10.1023/A:1004927811123

DO - 10.1023/A:1004927811123

M3 - 文章

AN - SCOPUS:0031313099

SN - 0038-0938

VL - 176

SP - 59

EP - 65

JO - Solar Physics

JF - Solar Physics

IS - 1

ER -

Flow around sunspots from p-mode frequency shift measurements

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