Observations of rotating sunspots from TRACE

Daniel Stephen Brown; RW Nightingale; D Alexander; CJ Schrijver; TR Metcalf; RA Shine; AM Title; CJ Wolfson

doi:10.1023/A:1026138413791

Observations of rotating sunspots from TRACE

Daniel Stephen Brown, RW Nightingale, D Alexander, CJ Schrijver, TR Metcalf, RA Shine, AM Title, CJ Wolfson

School of Mathematics and Statistics

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

172 Citations (Scopus)

Abstract

Recent observations from TRACE in the photospheric white-light channel have shown sunspots that rotate up to 200degrees about their umbral centre over a period of 3-5 days. The corresponding loops in the coronal fan are often seen to twist and can erupt as flares. In an ongoing study, seven cases of rotating sunspots have been identified, two of which can be associated with sigmoid structures appearing in Yohkoh/SXT and six with events seen by GOES. This paper analyzes the rotation rates of the sunspots using TRACE white-light data. Observations from AR 9114 are presented in detail in the main text and a summary of the results for the remaining six sunspots is presented in Appendixes A-F. Discussion of the key results, particularly common features, are presented, as well as possible mechanisms for sunspot rotation.

Original language	English
Pages (from-to)	79-108
Number of pages	30
Journal	Solar Physics
Volume	216
Issue number	1-2
DOIs	https://doi.org/10.1023/A:1026138413791
Publication status	Published - Sept 2003

Keywords

KINK INSTABILITY
CORONAL LOOPS
MAGNETIC RECONNECTION
NUMERICAL SIMULATIONS
SOLAR CORONA
FLUX TUBE
FLARE
EVOLUTION
TWIST
ZONE

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@article{5e29c0153dcf45c3b5fdf940092927e7,

title = "Observations of rotating sunspots from TRACE",

abstract = "Recent observations from TRACE in the photospheric white-light channel have shown sunspots that rotate up to 200degrees about their umbral centre over a period of 3-5 days. The corresponding loops in the coronal fan are often seen to twist and can erupt as flares. In an ongoing study, seven cases of rotating sunspots have been identified, two of which can be associated with sigmoid structures appearing in Yohkoh/SXT and six with events seen by GOES. This paper analyzes the rotation rates of the sunspots using TRACE white-light data. Observations from AR 9114 are presented in detail in the main text and a summary of the results for the remaining six sunspots is presented in Appendixes A-F. Discussion of the key results, particularly common features, are presented, as well as possible mechanisms for sunspot rotation.",

keywords = "KINK INSTABILITY, CORONAL LOOPS, MAGNETIC RECONNECTION, NUMERICAL SIMULATIONS, SOLAR CORONA, FLUX TUBE, FLARE, EVOLUTION, TWIST, ZONE",

author = "Brown, {Daniel Stephen} and RW Nightingale and D Alexander and CJ Schrijver and TR Metcalf and RA Shine and AM Title and CJ Wolfson",

year = "2003",

month = sep,

doi = "10.1023/A:1026138413791",

language = "English",

volume = "216",

pages = "79--108",

journal = "Solar Physics",

issn = "0038-0938",

publisher = "Springer",

number = "1-2",

}

TY - JOUR

T1 - Observations of rotating sunspots from TRACE

AU - Brown, Daniel Stephen

AU - Nightingale, RW

AU - Alexander, D

AU - Schrijver, CJ

AU - Metcalf, TR

AU - Shine, RA

AU - Title, AM

AU - Wolfson, CJ

PY - 2003/9

Y1 - 2003/9

N2 - Recent observations from TRACE in the photospheric white-light channel have shown sunspots that rotate up to 200degrees about their umbral centre over a period of 3-5 days. The corresponding loops in the coronal fan are often seen to twist and can erupt as flares. In an ongoing study, seven cases of rotating sunspots have been identified, two of which can be associated with sigmoid structures appearing in Yohkoh/SXT and six with events seen by GOES. This paper analyzes the rotation rates of the sunspots using TRACE white-light data. Observations from AR 9114 are presented in detail in the main text and a summary of the results for the remaining six sunspots is presented in Appendixes A-F. Discussion of the key results, particularly common features, are presented, as well as possible mechanisms for sunspot rotation.

AB - Recent observations from TRACE in the photospheric white-light channel have shown sunspots that rotate up to 200degrees about their umbral centre over a period of 3-5 days. The corresponding loops in the coronal fan are often seen to twist and can erupt as flares. In an ongoing study, seven cases of rotating sunspots have been identified, two of which can be associated with sigmoid structures appearing in Yohkoh/SXT and six with events seen by GOES. This paper analyzes the rotation rates of the sunspots using TRACE white-light data. Observations from AR 9114 are presented in detail in the main text and a summary of the results for the remaining six sunspots is presented in Appendixes A-F. Discussion of the key results, particularly common features, are presented, as well as possible mechanisms for sunspot rotation.

KW - KINK INSTABILITY

KW - CORONAL LOOPS

KW - MAGNETIC RECONNECTION

KW - NUMERICAL SIMULATIONS

KW - SOLAR CORONA

KW - FLUX TUBE

KW - FLARE

KW - EVOLUTION

KW - TWIST

KW - ZONE

U2 - 10.1023/A:1026138413791

DO - 10.1023/A:1026138413791

M3 - Article

SN - 0038-0938

VL - 216

SP - 79

EP - 108

JO - Solar Physics

JF - Solar Physics

IS - 1-2

ER -

Observations of rotating sunspots from TRACE

Abstract

Keywords

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