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Titolo:
Energetic neutral atom imaging of the heliospheric boundary region
Autore:
Gruntman, M; Roelof, EC; Mitchell, DG; Fahr, HJ; Funsten, HO; McComas, DJ;
Indirizzi:
Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA Univ So Calif Los Angeles CA USA 90089 ch Engn, Los Angeles, CA 90089 USA Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20707 USA Johns Hopkins Univ Laurel MD USA 20707 ppl Phys Lab, Laurel, MD 20707 USA Univ Bonn, Inst Astrophys & Extraterrestris Forsch, D-53121 Bonn, Germany Univ Bonn Bonn Germany D-53121 aterrestris Forsch, D-53121 Bonn, Germany Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA Univ Calif Los Alamos Natl Lab Los Alamos NM USA 87545 amos, NM 87545 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A8, volume: 106, anno: 2001,
pagine: 15767 - 15781
SICI:
0148-0227(20010801)106:A8<15767:ENAIOT>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOCAL INTERSTELLAR-MEDIUM; PICK-UP IONS; WIND TERMINATION SHOCK; SOLAR-WIND; COSMIC-RAYS; HYDROGEN-ATOMS; ACCELERATION; ULYSSES; GAS; INTERFACE;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
109
Recensione:
Indirizzi per estratti:
Indirizzo: Gruntman, M Univ So Calif, Dept Aerosp & Mech Engn, MC-1191, Los Angeles, CA 90089 USA Univ So Calif MC-1191 Los Angeles CA USA 90089 s, CA 90089 USA
Citazione:
M. Gruntman et al., "Energetic neutral atom imaging of the heliospheric boundary region", J GEO R-S P, 106(A8), 2001, pp. 15767-15781

Abstract

Energetic neutral atom (ENA) imaging is a powerful technique, which can remotely probe the properties of distant hot plasmas. Hot plasmas are abundant at the heliospheric boundary, the region where the expanding solar wind meets the surrounding local interstellar cloud. Here we present a new concept for imaging this boundary in ENA fluxes. Heliospheric ENAs are born from charge exchange between energetic protons and the background interstellar atomic hydrogen gas. The technique is ideal for studying the asymmetric three-dimensional heliospheric interface region remotely, from 1 AU. We show that ENA imaging in the 0.2-6 keV energy range will establish the nature of the termination shock and properties of hot proton populations in the heliosheath. We also examine how the evolution of pickup proton populations at and beyond the shock can be explored. Global heliosphere ENA images will distinguish among the competing models of the interaction between the Sun and the local interstellar medium, and they will reveal the physics of importantprocesses in the interface region. Heliospheric ENA fluxes are exceptionally weak, which makes imaging implementation difficult. Nonetheless, we showhow single-pixel ENA sensors can image the heliosphere from a spinning spacecraft on a typical mission near 1 AU. The required instrumentation is briefly discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 12:15:18