TITLE:
Survey of Compressions Observed in the Heliosheath with the Spacecraft Voyager
AUTHORS:
Danie Benjamín Berdichevsky
KEYWORDS:
Magnetic Field Measurement Techniques, Solar Heliosphere’s Heliosheath, MHD
JOURNAL NAME:
Advances in Aerospace Science and Technology,
Vol.6 No.1,
March
18,
2021
ABSTRACT: Examples of changes in the magnitude of the B-field after the heliosphere termination shock (TS)
with both Voyager spacecraft (SC) are presented. The work focuses on
similarities and differences in the observations at their in-situ measurements along divergent paths. The presented results
were collected where the accuracy of the magnetometer is the highest. These
locations are those wherein, four to seven times during the year, the SC
performs about 330 minutes of slow rotations identified in the SC language as
MAGROLs. They are next reviewed, with the understanding that after the TS, at
MAGROLs, the solar wind (SW) flows appear to be mostly sub-magnetosonic and
compressional in this region, region named helio-sheath (HS). This is a
preliminary survey that uses 48 sec B-field
averages. The time-intervals in this work fill gaps in the currently available
studies for longer time intervals. The present study reinforces the view that
in the HS after the TS the SW is most likely strongly compressional. Further we discuss the fact that observed
fluctuation intensity-modes of the B-field in our time-ranges appear to
be much more pronounced at the Voyager 2 path than at the Voyager 1 path.