Abstract
Blum and Farr1 have suggested modifications of current theories2,3 concerning the interaction of the solar wind with interstellar hydrogen. One feature of their model involves the motion of the solar system. This motion, coupled with the velocity of the interstellar hydrogen, results in a velocity of 10 to 40 km sā1 for interstellar hydrogen relative to the solar system. According to Blum and Fahr the relative velocity gives rise to an anisotropic distribution of neutral hydrogen atoms in interplanetary space. The neutral hydrogen density is enhanced in the direction of approach of the interstellar hydrogen and diminished in the opposite hemisphere. The motion of the interstellar hydrogen is assumed to cause a highly aspherical transition region between the hydrogen and the solar wind.
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References
Blum, P. F., and Fahr, H. J., Nature, 223, 937 (1969).
Patterson, T. N. L., Johnson, F. S., and Hanson, W. B., Planet. Space Sci., 11, 767 (1963).
Hundhausen, A. J., Planet. Space Sci., 16, 783 (1968).
Fuller, J. C., Chambers, W. H., Fehlau, P. E., and Kunz, W. E., Trans. Amer. Geophys. Un., 49, 254 (1968).
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CHAMBERS, W., FEHLAU, P., FULLER, J. et al. Anisotropic Atomic Hydrogen Distribution in Interplanetary Space. Nature 225, 713ā714 (1970). https://doi.org/10.1038/225713a0
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DOI: https://doi.org/10.1038/225713a0
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