Extreme-Ultraviolet Sunspot Plumes Observed with [ITAL]SOHO[/ITAL] | Zendy

P. Maltby | Zendy; N. Brynildsen | Zendy; P. Brekke | Zendy; S. V. H. Haugan | Zendy; O. KjeldsethMoe | Zendy; Ø. Wikstøl | Zendy; Thomas Rimmelé | Zendy

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Extreme-Ultraviolet Sunspot Plumes Observed with [ITAL]SOHO[/ITAL]

Author(s) -

P. Maltby,

N. Brynildsen,

P. Brekke,

S. V. H. Haugan,

O. KjeldsethMoe,

Ø. Wikstøl,

Thomas Rimmelé

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311261

Subject(s) - sunspot , physics , solar maximum , extreme ultraviolet lithography , extreme ultraviolet , solar minimum , astrophysics , observatory , coronal hole , solar physics , astronomy , coronal mass ejection , magnetic field , solar cycle , solar wind , optics , laser , quantum mechanics

Bright EUV sunspot plumes have been observed in five out of nine sunspotregions with the Coronal Diagnostic Spectrometer -- CDS on SOHO. In the otherfour regions the brightest line emissions may appear inside the sunspot but aremainly concentrated in small regions outside the sunspot areas. These resultsare in contrast to those obtained during the Solar Maximum Mission, but arecompatible with the Skylab mission results. The present observations show thatsunspot plumes are formed in the upper part of the transition region, occurboth in magnetic unipolar-- and bipolar regions, and may extend from the umbrainto the penumbra.Comment: 8 pages, 3 figures, to be published in ApJ Letter

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