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Title:
Deflection of the Interstellar Neutral Hydrogen Flow Across the Heliospheric Interface
Authors:
Lallement, R.; Quémerais, E.; Bertaux, J. L.; Ferron, S.; Koutroumpa, D.; Pellinen, R.
Affiliation:
AA(Service d'Aéronomie du Centre National de la Recherche Scientifique, Institut Pierre Simon Laplace, Boite Postale 3, 91371 Verrières-le-Buisson, France), AB(Service d'Aéronomie du Centre National de la Recherche Scientifique, Institut Pierre Simon Laplace, Boite Postale 3, 91371 Verrières-le-Buisson, France), AC(Service d'Aéronomie du Centre National de la Recherche Scientifique, Institut Pierre Simon Laplace, Boite Postale 3, 91371 Verrières-le-Buisson, France), AD(Service d'Aéronomie du Centre National de la Recherche Scientifique, Institut Pierre Simon Laplace, Boite Postale 3, 91371 Verrières-le-Buisson, France), AE(Service d'Aéronomie du Centre National de la Recherche Scientifique, Institut Pierre Simon Laplace, Boite Postale 3, 91371 Verrières-le-Buisson, France), AF(Finnish Meteorological Institute, Post Office Box 503, 00101 Helsinki, Finland.)
Publication:
Science, Volume 307, Issue 5714, pp. 1447-1449 (2005). (Sci Homepage)
Publication Date:
03/2005
Category:
ASTRONOMY
Origin:
SCIENCE
DOI:
10.1126/science.1107953
Bibliographic Code:
2005Sci...307.1447L

Abstract

Using an absorption cell, we measured the Doppler shifts of the interstellar hydrogen resonance glow to show the direction of the neutral hydrogen flow as it enters the inner heliosphere. The neutral hydrogen flow is found to be deflected relative to the helium flow by about 4°. The most likely explanation of this deflection is a distortion of the heliosphere under the action of an ambient interstellar magnetic field. In this case, the helium flow vector and the hydrogen flow vector constrain the direction of the magnetic field and act as an interstellar magnetic compass.
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