Possible Origin of the Secondary Stream ofNeutral Fluxes at 1 AU 

Peter Wurz, Michael R. Collier, Thomas E. Moore, David Simpson, 
Stephen Fuselier, and Walter Lennartson


The existence of a secondary stream of neutral atoms inside the heliosphere
arriving from about 285¡ ecliptic longitude, which is about 30¡ higher than the
nominal upstream directionof the inflowing interstellar gas, has been proposed
recently based on a wide variety of observations from many different missions.
We will discuss the LENA/IMAGE measurements in detailand conclude that the
secondary stream is composed mainly of hydrogen atoms at an energy of about 1
keV. We will discuss some possible explanations for the origin of the secondary
stream,with the most likely source being the region upstream of the termination
shock. 

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AIP Conference Proceedings 719, 195-200, 2004.