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Titolo:
A MAGNETIC CLOUD CONTAINING PROMINENCE MATERIAL - JANUARY 1997
Autore:
BURLAGA L; FITZENREITER R; LEPPING R; OGILVIE K; SZABO A; LAZARUS A; STEINBERG J; GLOECKLER G; HOWARD R; MICHELS D; FARRUGIA C; LIN RP; LARSON DE;
Indirizzi:
NASA,EXTRATERR PHYS LAB,GODDARD SPACE FLIGHT CTR GREENBELT MD 20771 MIT,CTR SPACE RES CAMBRIDGE MA 02139 UNIV MARYLAND,DEPT PHYS COLLEGE PK MD 20742 USN,RES LAB,EO HULBURT CTR SPACE RES WASHINGTON DC 20375 UNIV NEW HAMPSHIRE,INST STUDY EARTH OCEANS & SPACE DURHAM NH 03824 UNIV CALIF BERKELEY,SPACE SCI LAB BERKELEY CA 94708
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A1, volume: 103, anno: 1998,
pagine: 277 - 285
SICI:
2169-9380(1998)103:A1<277:AMCCPM>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONAL MASS EJECTIONS; DISAPPEARING SOLAR FILAMENTS; HELIOSPHERIC CURRENT SHEET; FLUX-ROPES; 1 AU; IONOSPHERIC CONVECTION; GEOMAGNETIC-ACTIVITY; NONLINEAR EVOLUTION; COMPOUND STREAMS; CURRENT LOOPS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
82
Recensione:
Indirizzi per estratti:
Citazione:
L. Burlaga et al., "A MAGNETIC CLOUD CONTAINING PROMINENCE MATERIAL - JANUARY 1997", J GEO R-S P, 103(A1), 1998, pp. 277-285

Abstract

This work discusses the relations among (1) an interplanetary force-free magnetic cloud containing a plug of cold high-density material with unusual composition, (2) a coronal mass ejection (CME), (3) an eruptive prominence, and (4) a model of prominence material supported by a force-free magnetic flux rope in a coronal streamer. The magnetic cloud moved past the Wind spacecraft located in the solar wind upstream ofEarth on January 10 and 11, 1997, The magnetic field configuration inthe magnetic cloud was approximately a constant-cu, force-free flux rope, The He-4(++)/H+ abundance in the most of the magnetic cloud was similar to that of the streamer belt material, suggesting an association between the magnetic cloud and a helmet streamer. A very cold regionof exceptionally high density was detected at the rear of the magnetic cloud. This dense region had an unusual composition, including (1) arelatively high (10%) He-4(++)/He+ abundance (indicating a source near the photosphere), and (2) He-4(+), with an abundance relative to He-4(++) of similar to 1%, and the unusual charge states of O5+ and Fe5+ (indicating a freezing-in temperature of (1.6-4.0) x 10(5) degrees K, which is unusually low, but consistent with that expected for prominence material). Thus we suggest that the high-density region might be prominence material. The CME was seen in the solar corona on January 6, 1997, by the large angle and spectrometric coronagraph (LASCO) instrument on SOHO shortly after an eruptive prominence. A helmet streamer was observed near the latitude of the eruptive prominence a quarter of asolar rotation before and after the eruptive prominence. These observations are consistent with recent models, including the conceptual model of Low and Hundhausen [1995] for a quasi-static helmet streamer containing a force-free flux rope which supports prominence material and the dynamical model of Wu et al. [1997] for CMEs produced by the disruption of such a configuration.

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Documento generato il 07/07/20 alle ore 22:23:14