Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Coronal mass ejections: Origins, evolution, and role in space weather
Autore:
Webb, DF;
Indirizzi:
Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA Boston Coll Chestnut Hill MA USA 02167 i Res, Chestnut Hill, MA 02167 USA AFRL, Space Vehicle Dir, Hanscom AFB, MA 01731 USA AFRL Hanscom AFB MA USA 01731 pace Vehicle Dir, Hanscom AFB, MA 01731 USA
Titolo Testata:
IEEE TRANSACTIONS ON PLASMA SCIENCE
fascicolo: 6, volume: 28, anno: 2000,
pagine: 1795 - 1806
SICI:
0093-3813(200012)28:6<1795:CMEOEA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
EARTH CONNECTION EVENT; MAGNETIC-FLUX ROPE; SOLAR-FLARE MYTH; X-RAY EVENTS; LASCO OBSERVATIONS; JANUARY 1997; SOHO/EIT OBSERVATIONS; GEOMAGNETIC STORM; SMM OBSERVATIONS; WIND SPACECRAFT;
Keywords:
coronal mass ejections; geomagnetism; magnetic storms; solar corona;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
89
Recensione:
Indirizzi per estratti:
Indirizzo: Webb, DF Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA Boston Coll Chestnut Hill MA USA 02167 estnut Hill, MA 02167 USA
Citazione:
D.F. Webb, "Coronal mass ejections: Origins, evolution, and role in space weather", IEEE PLAS S, 28(6), 2000, pp. 1795-1806

Abstract

Coronal mass ejections (CMEs) are an important element of coronal and interplanetary dynamics. They can inject large amounts of mass and magnetic fields into the heliosphere, causing major geomagnetic storms and interplanetary shocks, which are a key source of solar energetic particles (E > 1 MeV). Until recently, our understanding of the origins and early development of CMEs at the sun mas very limited. We knew that CMEs were frequently associated with erupting prominences and long-enduring X-ray arcades, hut our physical understanding of how and why CMEs are initiated was poor. However, recent studies using the excellent data sets from the Yohkoh, SOHO, Wind, ACE and other spacecraft and ground-based instruments have improved our knowledge of the mass ejection process and how it effects space weather. I review some of the well-determined coronal propel ties of CMEs, what we know abouttheir source regions, and what their manifestations are in the solar wind. One eliciting new type of observation is of halo-like CMEs, which suggest the launch of a geoeffective disturbance toward earth. Several studies haleshown a good correspondence between halo CMEs accompanied by near-sun center surface activity and subsequent magnetic clouds and geomagnetic storms at earth. In addition. halo CMEs are important for understanding the internal structure of CMEs since their source regions are near Sun center and near-earth spacecraft may be likely to sample material along their central axes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 22:33:05