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Titolo: EUV Sprays: Jet-like eruptive activity on the solar limb
Autore: Harrison, RA; Bryans, P; Bingham, R;
- Indirizzi:
- Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England Rutherford Appleton Lab Didcot Oxon England OX11 0QX 1 0QX, Oxon, England Univ Strathclyde, Dept Phys & Appl Phys, Glasgow, Lanark, Scotland Univ Strathclyde Glasgow Lanark Scotland Phys, Glasgow, Lanark, Scotland
- Titolo Testata:
- ASTRONOMY & ASTROPHYSICS
fascicolo: 1,
volume: 379,
anno: 2001,
pagine: 324 - 335
- SICI:
- 1432-0746(200111)379:1<324:ESJEAO>2.0.ZU;2-3
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- CORONAL DIAGNOSTIC SPECTROMETER; MASS EJECTION;
- Keywords:
- Sun : UV radiation; Sun : activity; Sun : atmosphere; Sun : corona;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 12
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Harrison, RA Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England Rutherford Appleton Lab Didcot Oxon England OX11 0QX England
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- Citazione:
- R.A. Harrison et al., "EUV Sprays: Jet-like eruptive activity on the solar limb", ASTRON ASTR, 379(1), 2001, pp. 324-335
Abstract
Jet-like eruptive events have been detected in the extreme ultraviolet (EUV) observations from the Solar and Heliospheric Observatory (SOHO) spacecraft. Some jet-like events are shown and for one event, that of January 22 2000, we provide a detailed analysis of the EUV observations. The January 22 observation was part of an on-going campaign to observe the onset of coronal mass ejections (CMEs) using extreme ultraviolet spectroscopy. A high-temperature fan-like jet was first detected in emission lines from plasmas at one million K and over, and it appears to be the onset of a narrow mass ejection identified later in coronagraph data. This was followed by a dramatic jet or finger of cool (less than or equal to 250 000 K), rotating plasma which extended vertically, high into the corona. It extended well beyond the field of view of the instrument and appears to relate to a small ejected cloud which is detected in subsequent coronagraph data. The spectroscopic characteristics are used to provide plasma diagnostic information for these two events, and this combined with images for a wide range of temperatures allows a thorough investigation of the processes leading to such eruptions. Asimple accreting magnetic field model is used to descibe the basic features of the jet activity.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/05/13 alle ore 05:50:38