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Titolo:
Polar cap X-rays and electrons under low density solar wind conditions: Coordinated PIXIE and DMSP observations on 11 May 1999
Autore:
Anderson, PC; McKenzie, DL; Datlowe, DW; Hawley, JD; Petrinec, SM; Schulz, M; Larson, DE;
Indirizzi:
Aerospace Corp, Space Sci Applicat Lab, El Segundo, CA 90009 USA AerospaceCorp El Segundo CA USA 90009 icat Lab, El Segundo, CA 90009 USA Lockheed Martin Adv Technol Ctr, Space Phys Dept, Palo Alto, CA 94304 USA Lockheed Martin Adv Technol Ctr Palo Alto CA USA 94304 Alto, CA 94304 USA Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 Sci Lab, Berkeley, CA 94720 USA
Titolo Testata:
GEOPHYSICAL RESEARCH LETTERS
fascicolo: 24, volume: 27, anno: 2000,
pagine: 4021 - 4024
SICI:
0094-8276(200012)27:24<4021:PCXAEU>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
RAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Anderson, PC Aerospace Corp, Space Sci Applicat Lab, POB 92957 M2-260, El Segundo, CA 90009 USA Aerospace Corp POB 92957 M2-260 El Segundo CA USA 90009 9 USA
Citazione:
P.C. Anderson et al., "Polar cap X-rays and electrons under low density solar wind conditions: Coordinated PIXIE and DMSP observations on 11 May 1999", GEOPHYS R L, 27(24), 2000, pp. 4021-4024

Abstract

X-ray images from 11 May 1999 typically show emissions filling a region above about 75 degrees - 80 degrees magnetic latitude with the emitting region centered a few degrees toward mid-morning from the magnetic pole during aperiod when the solar wind reached unusually low values. Ionospheric particle measurements show the entire northern polar cap illuminated by precipitating electrons during much of this time, while the southern polar cap was mostly "dark. " The precipitating electrons had multicomponent spectra, one component with characteristic energy similar to 200 eV throughout the observation period, and others with time-varying characteristic energies rangingbetween similar to3.5 keV and 10 keV, all components with spatial characteristics common to polar rain. Measurements in the solar wind also show similar multicomponent spectra and are relatively well correlated with observations of solar radio bursts and the polar-cap x-ray flux. We conclude that the higher energy components were associated with electrons accelerated in solar flares or coronal flare-like events.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 04:55:31