`Torus' Distribution of Interstellar Helium Pickup Ions: Direct Observation

Details `Torus' Distribution of Interstellar Helium Pickup Ions: Direct Observation `Torus' Distribution of Interstellar Helium Pickup Ions: Direct Observation

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh31b..03o&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SH31B-03

Mathematics

Probability

7823 Ionization Processes, 7859 Transport Processes, 2149 Mhd Waves And Turbulence, 2152 Pickup Ions

Scientific paper

Recent studies of interstellar pickup ions indicate a large mean free math λ , suggesting a low pitch angle scattering rate of the pickup ions in the solar wind. To confirm the effect of the findings, the distribution function of helium pickup ions is measured with the GEOTAIL/LEP instrument on the upstream of the Earth's bow shock. It is found that these helium pickup ions exhibit a `torus'-like velocity distribution for ~20% of the GEOTAIL observation time. The probability of observing such a non-spherical distribution is higher ( ~40%) when the magnetic turbulence level (|δ /rightarrow{ {B}}|/|{\bar B}|) is lower (< ~0.1), while a spherical distribution is found for ~60% of the observation time when the turbulence is relatively large (> ~0.2).

Affiliated with

Also associated with

No associations

Rating

`Torus' Distribution of Interstellar Helium Pickup Ions: Direct Observation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with `Torus' Distribution of Interstellar Helium Pickup Ions: Direct Observation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and `Torus' Distribution of Interstellar Helium Pickup Ions: Direct Observation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1723645