Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh43a1095m&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SH43A-1095
Physics
7837 Neutral Particles, 7843 Numerical Simulation Studies, 2124 Heliopause And Solar Wind Termination, 2144 Interstellar Gas
Scientific paper
Interstellar cloud types within several hundred pc of the Sun vary in their density, temperature, degree of ionization, and galactic velocity. This suggests that during its lifetime, the heliosphere has been exposed to a variety of different interstellar environments. In particular, the Sun was once located in the hot, ionized, low-density plasma interior of the Local Bubble, and may occasionally be battered by high-velocity interstellar shock fronts. By means of numerical modeling, the interaction of the solar wind (assumed constant) with a variety of partially ionized interstellar media is investigated. A range of ISM densities, relative velocities, and temperatures is considered, including the three cases of the interior of the Local Bubble; an encounter with a high-density cloud; and immersion in a high velocity medium. The resulting changed heliospheric structures are discussed, as are the altered distributions of neutral atoms and galactic cosmic ray spectra.
Florinski Vladimir
Frisch Priscilla C.
Mueller Hans-Reinhard
Zank Gary P.
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