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Titolo:
LASCO OBSERVATIONS OF DISCONNECTED MAGNETIC-STRUCTURES OUT TO BEYOND 28 SOLAR RADII DURING CORONAL MASS EJECTIONS
Autore:
SIMNETT GM; TAPPIN SJ; PLUNKETT SP; BEDFORD DK; EYLES CJ; STCYR OC; HOWARD RA; BRUECKNER GE; MICHELS DJ; MOSES JD; SOCKER D; DERE KP; KORENDYKE CM; PASWATERS SE; WANG D; SCHWENN R; LAMY P; LLEBARIA A; BOUT MV;
Indirizzi:
UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND USN,EO HULBURT CTR SPACE RES,RES LAB WASHINGTON DC 20375 MAX PLANCK INST AERON KATLENBURG DUHM GERMANY ASTRON SPATIALE LAB F-13376 MARSEILLE FRANCE
Titolo Testata:
Solar physics
fascicolo: 2, volume: 175, anno: 1997,
pagine: 685 - 698
SICI:
0038-0938(1997)175:2<685:LOODMO>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
G.M. Simnett et al., "LASCO OBSERVATIONS OF DISCONNECTED MAGNETIC-STRUCTURES OUT TO BEYOND 28 SOLAR RADII DURING CORONAL MASS EJECTIONS", Solar physics, 175(2), 1997, pp. 685-698

Abstract

Two coronal mass ejections have been well observed by the LASCO coronagraphs to move out into the interplanetary medium as disconnected plasmoids. The first, on July 28, 1996, left the Sun above the west limb around 18:00 UT. As it moved out, a bright V shaped structure was visible in the C2 coronagraph which moved into the field-of-view of C3 andcould be observed out to beyond 28 solar radii. The derived average velocity in the plane of the sky was 110 +/- 5 km s(-1) out to 5 solar radii, and above 15 solar radii the velocity was 269 +/- 10 km s(-1). Thus there is evidence of some acceleration around 6 solar radii. The second event occurred on November 5, 1996 and left the west limb around 04:00 UT. The event had an average velocity in the plane of the sky of similar to 511 km s(-1) below 4 R-., and it accelerated rapidly around 5 R-. up to 310 +/- 10 km s(-1). In both events the rising plasmoid is connected back to the Sun by a straight, bright ray, which is probably a signature of a neutral sheet. In the November event there is evidence for multiple plasmoid ejections. The acceleration of the plasmoids around a projected altitude of 5 solar radii is probably a manifestation of the source surface of the solar wind.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/10/20 alle ore 04:49:43