R. C. Canfield scite author profile

Abstract.Soft X-ray images of solar active regions frequently show S-or inverse-S (sigmoidal) morphology. We have studied the Yohkoh Soft X-Ray Telescope video movie for 1993 and 1997. We have classified active regions according to morphology (sigmoidal or non-sigmoidal) and nature of activity (eruptive or non-eruptive). As well, we have used NOAA sunspot areas for each region as a measure of size. We find that regions are significantly more likely to be eruptive if they are either sigmoidal or large.

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Lin

et al. 2002

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H alpha Surges and X-Ray Jets in AR 7260

Canfield¹,

Reardon²,

Leka³

et al. 1996

ApJ

277

272

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Is the solar chromospheric magnetic field force-free?

Metcalf¹,

Jiao²,

McClymont³

et al. 1995

ApJ

274

281

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Flare Loop Radiative Hydrodynamics - Part Seven - Dynamics of the Thick Target Heated Chromosphere

Fisher¹,

Canfield²,

McClymont³

1985

ApJ

282

233

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Patterns of helicity in solar active regions

Pevtsov¹,

Canfield²,

Metcalf³

1994

ApJ

165

139

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Flare loop radiative hydrodynamics. V - Response to thick-target heating. VI - Chromospheric evaporation due to heating by nonthermal electrons. VII - Dynamics of the thick-target heated chromosphere

Fisher¹,

Canfield²,

McClymont³

1985

ApJ

345

145

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R. C. Canfield

Latitudinal variation of helicity of photospheric magnetic fields

Sigmoidal morphology and eruptive solar activity

Untitled

H alpha Surges and X-Ray Jets in AR 7260

Is the solar chromospheric magnetic field force-free?

Flare Loop Radiative Hydrodynamics - Part Seven - Dynamics of the Thick Target Heated Chromosphere

Patterns of helicity in solar active regions

Flare loop radiative hydrodynamics. V - Response to thick-target heating. VI - Chromospheric evaporation due to heating by nonthermal electrons. VII - Dynamics of the thick-target heated chromosphere

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