Solar wind flow about the outer planets: Gas dynamic modeling of the Jupiter and Saturn bow shocks

摘要: Pioneer 10 and 11 Voyager 1 2 observations are used to study global aspects of the solar wind interaction with Jupiter Saturn. Solar measurements before after encounters determine average upstream flow parameters at 5 9 AU. Bow shock magnetopause position found vary as fourth root dynamic pressure sixth The distances nose based upon boundary crossings for Saturn 68 RJ 19 RS, respectively, correction varying pressure. In shape, Jovian bow surfaces similar their terrestrial counterparts, but width magnetosheath is 45% less than predicted by axisymmetric gas theory. This result interpreted evidence strong polar flattening magnetosphere. Saturnian boundaries significantly more flared earth a subsolar that 20% thinner On basis these results it suggested intermediate between in terms flattening, unusual flaring being due low ratio static distant heliosphere.