Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
THE REGULAR STRUCTURE OF SHOCK-ACCELERATED SIMILAR-TO-40-100 KEV ELECTRONS IN THE HIGH-LATITUDE HELIOSPHERE
Autore:
ROELOF EC; SIMNETT GM; TAPPIN SJ;
Indirizzi:
JOHNS HOPKINS UNIV,APPL PHYS LAB,JOHNS HOPKINS RD LAUREL MD 20723 UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND
Titolo Testata:
Astronomy and astrophysics
fascicolo: 2, volume: 316, anno: 1996,
pagine: 481 - 486
SICI:
0004-6361(1996)316:2<481:TRSOSS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLAR-WIND; ULYSSES; PROTONS;
Keywords:
INTERPLANETARY MEDIUM; ACCELERATION OF PARTICLES; SHOCK WAVES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
E.C. Roelof et al., "THE REGULAR STRUCTURE OF SHOCK-ACCELERATED SIMILAR-TO-40-100 KEV ELECTRONS IN THE HIGH-LATITUDE HELIOSPHERE", Astronomy and astrophysics, 316(2), 1996, pp. 481-486

Abstract

The passage of Ulysses through the high latitude heliosphere has given us a new insight into the interplanetary dynamical processes which are occurring, at any rate near solar minimum, in the heliosphere abovethe streamer belt. We report here observations of similar to 40-100 keV electrons and similar to 0.5 MeV protons detected by HT-SCALE from 1992-96. Apart from a few increases associated with solar energetic particle events and coronal mass ejections, the dominant events were recurrent and associated with a long-lived corotating interaction region (CIR). Furthermore, we show that for the majority of the high latitudeevents the acceleration region is at radial distances many AU beyond the spacecraft. Beginning with the hypothesis that the acceleration istaking place at the reverse shock of a regular, but expanding CIR, weshow that the appearance of the electron increases at Ulysses is ordered by the right ascension and radial distance of Ulysses in the frameof reference corotating with the Sun. The timing of the maxima of theelectron recurrences is predicted sufficiently accurately with this model, so that the accelerated electrons can be used as a clock during the high latitude phase of the mission. Although the recurrent events are not as strong in the northern hemisphere as in the south, those seen up to the middle of March, 1996 are consistent with the model when known changes in the coronal structure are taken into account.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 15:57:25