Interplanetary shocks observed by ULYSSES in the ecliptic plane as a function of the heliocentric distance

Details Interplanetary shocks observed by ULYSSES in the ecliptic plane as a function of the heliocentric distance Interplanetary shocks observed by ULYSSES in the ecliptic plane as a function of the heliocentric distance

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15..371h&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 8-9, p. 371-374

Physics

4

Ecliptic, Electron Density (Concentration), Electron Energy, Interplanetary Magnetic Fields, Interplanetary Space, Shock Waves, Spatial Distribution, Data Reduction, Radio Spectroscopy, Shock Wave Profiles, Ulysses Mission

Scientific paper

During its mission in the ecliptic plane, the Ulysses spacecraft crossed many heliospheric large-scale structures. Several interplanetary (IP) shocks were identified and characterized using the radio receiver, magnetometer and proton analyser aboard. The spectroscopy of the thermal noise measured by the radio receiver gives the plasma electron density and temperature. We present a list of IP shocks detected between 1 and 5 AU. The upstream beta factor betau is estimated using the electron, proton and magnetic field data. The angle thetaBN between the upstream magnetic field and the shock normal, and the Alfven Mach number MA are deduced from the Rankine-Hugoniot relations using betau, the electron density Ned and Neu, and the magnetic field Bd and Bu. We investigate the correlation of the shock strength Ned/Neu with the heliocentric distance. Within 5 AU, the shock strength is found to increase with increasing distance to the Sun for shocks associated with corotating interaction regions, while it presents no significant dependence in distance for coronal mass ejection shocks.

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