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Titolo:
REVERSE SHOCK ACCELERATION OF ELECTRONS AND PROTONS AT MID-HELIOLATITUDES FROM 5.3-3.8-AU
Autore:
SIMNETT GM; ROELOF EC;
Indirizzi:
UNIV BIRMINGHAM,SCH PHYS & SPACE RES BIRMINGHAM B15 2TT W MIDLANDS ENGLAND JOHNS HOPKINS UNIV,APPL PHYS LAB LAUREL MD 20723
Titolo Testata:
Space science reviews
fascicolo: 1-2, volume: 72, anno: 1995,
pagine: 303 - 308
SICI:
0038-6308(1995)72:1-2<303:RSAOEA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULYSSES;
Keywords:
HELIOSPHERE; ENERGETIC PARTICLES; SHOCK ACCELERATION; REVERSE SHOCKS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
8
Recensione:
Indirizzi per estratti:
Citazione:
G.M. Simnett e E.C. Roelof, "REVERSE SHOCK ACCELERATION OF ELECTRONS AND PROTONS AT MID-HELIOLATITUDES FROM 5.3-3.8-AU", Space science reviews, 72(1-2), 1995, pp. 303-308

Abstract

We examine the intensity, anisotropy and energy spectrum of 480-966 keV protons and 38-315 keV electrons observed by the HI-SCALE instrument on Ulysses associated with Corotating Interaction Regions (CIR) frommid-1992 to early 1994. The particle events are most clearly ordered by the reverse shocks bounding the CIRs. The bulk of the ion fluxes appear either straddling, or with their maximum intensity following, thereverse shock. The electron intensities rise sharply to their maximumupon the passage of the reverse shock, and are delayed with respect to the protons. We believe that following acceleration at the reverse shock the electrons re-enter the inner heliosphere and mirror, to return to the reverse shock for repeated acceleration. This process is moreeffective for electrons (v similar to c/2) than for ions, and also favours the higher velocity electrons, which accounts for the observed spectral hardening with latitude.

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Documento generato il 26/11/20 alle ore 20:17:02