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Titolo:
Near-Sun and near-Earth manifestations of solar eruptions
Autore:
Gopalswamy, N; Lara, A; Kaiser, ML; Bougeret, JL;
Indirizzi:
Catholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20064 USA Catholic Univ Amer Washington DC USA 20064 ther, Washington, DC 20064 USA NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA NASA Greenbelt MDUSA 20771 ard Space Flight Ctr, Greenbelt, MD 20771 USA UNAM, Inst Geofis, Mexico City, DF, Mexico UNAM Mexico City DF MexicoUNAM, Inst Geofis, Mexico City, DF, Mexico Univ Paris, Dept Rech Spatiale, Meudon, France Univ Paris Meudon FranceUniv Paris, Dept Rech Spatiale, Meudon, France
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A11, volume: 106, anno: 2001,
pagine: 25261 - 25277
SICI:
0148-0227(20011101)106:A11<25261:NANMOS>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONAL MASS EJECTIONS; II RADIO EMISSIONS; INTERPLANETARY SHOCKS; WIND SPACECRAFT; MAGNETIC CLOUDS; LASCO OBSERVATIONS; ELECTRON-DENSITY; TRANSIENT WAVES; 1 AU; BURSTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Gopalswamy, N Catholic Univ Amer, Ctr Solar Phys & Space Weather, Washington, DC 20064 USA Catholic Univ Amer Washington DC USA 20064 on, DC 20064 USA
Citazione:
N. Gopalswamy et al., "Near-Sun and near-Earth manifestations of solar eruptions", J GEO R-S P, 106(A11), 2001, pp. 25261-25277

Abstract

We compare the near-Sun and near-Earth manifestations of solar eruptions that occurred during November 1994 to June 1998. We compared white-light coronal mass ejections, metric type II radio bursts, and extreme ultraviolet wave transients (near the Sun) with interplanetary (IP) signatures such as decameter-hectometric type II bursts, kilometric type II bursts, IP ejecta, and IP shocks. We did a two-way correlation study to (1) look for counterparts of metric type II bursts that occurred close to the central meridian and (2) look for solar counterparts of IP shocks and IP ejecta. We used data from Wind and Solar and Heliospheric Observatory missions along with metricradio burst data from ground-based solar observatories. Analysis shows that (1) most (93%) of the metric type II bursts did not have IP signatures, (2) most (80%) of the IP events (IP ejecta and shocks) did not have metric counterparts, and (3) a significant fraction (26%) of IP shocks were detected in situ without drivers. In all these cases the drivers (the coronal massejections) were ejected transverse to the Sun-Earth line, suggesting that the shocks have a much larger extent than the drivers. Shocks originating from both limbs of the Sun arrived at Earth, contradicting earlier claims that shocks from the west limb do not reach Earth. These shocks also had goodtype II radio burst association. We provide an explanation for the observed relation between metric, decameter-hectometric, and kilometric type II bursts based on the fast mode magnetosonic speed profile in the solar atmosphere.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 20:24:10