Other
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21812925s&link_type=abstract
American Astronomical Society, AAS Meeting #218, #129.25; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Interstellar dust (ISD) has been directly observed flowing into the Solar System. This dust has an unusual size distribution relative to typical ISD with small grains (a < 0.1 micron) deficient and large grains (about 1 micron) abundant. Such large grains are not expected to be present in warm, low density gas such as the Local Interstellar Cloud (LIC) that surrounds the Solar System. It is unclear whether the missing small grains have been excluded from the inner heliosphere by the solar wind magnetic field, or whether they are absent entirely from the LIC. If the grains are present in the LIC their density should be enhanced in the heliosheath and they should be heated by the Sun's UV radiation field. The emission from such grains may be observable and would provide a means of observing the grains that is lacking otherwise. We present the results of new models for the emission of the grains based on calculations of the trajectories of ISD grains incident on the heliosphere and resulting space densities as a function of grain size.
Frisch Priscilla C.
Heerikhuisen Jacob
Mueller Hans-Reinhard
Pogorelov Nikolai V.
Reach William T.
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