HR: 1330h
AN: SH23A-05    [Abstracts]
TI: Deflection of the Interstellar Neutral Hydrogen Flow Across the Heliospheric Interface: an Interstellar Magnetic Compass
AU: * Lallement, R
EM: rosine.lallement@aerov.jussieu.fr
AF: SERVIVE D'AERONOMIE, BP 3, VERRIERES-LE-BUISSON, 91371 France
AU: ERIC, Q
EM: eric.quemerais@aerov.jussieu.fr
AF: SERVIVE D'AERONOMIE, BP 3, VERRIERES-LE-BUISSON, 91371 France
AU: JEAN-LOUP, B
EM: bertaux@aerov.jussieu.fr
AF: SERVIVE D'AERONOMIE, BP 3, VERRIERES-LE-BUISSON, 91371 France
AU: DIMITRA, K
EM: Dimitra.Koutroumpa@aerov.jussieu.fr
AF: SERVIVE D'AERONOMIE, BP 3, VERRIERES-LE-BUISSON, 91371 France
AU: RISTO, P
EM: risto.pellinen@fmi.fi
AF: FINNISH METEOROLOGICAL INSTITUTE, P.O. Box 503, HELSINKI, 00101 Finland
AB: Analyses of SOHO-SWAN observations show that the interstellar neutral H flow direction differs by about 4 degrees from the neutral He flow direction recently derived with an unprecedented accuracy using combined data sets (Mobius et al, 2004). The most likely explanation is a distortion of the heliospheric interface under the action of an inclined interstellar magnetic field, with imprints of the distorsion on the neutral H flow due to charge-transfer reactions between H atoms and ions. The direction of the ambient interstellar magnetic field and the heliospheric shape can be derived from the observed deviation. Implications for Voyager trajectories are discussed.
DE: 2124 Heliopause and solar wind termination
DE: 2144 Interstellar gas
DE: 2151 Neutral particles
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly