Magnetic Fields in the Heliosheath and Distant Heliosphere: Voyager 1 and 2 Observations During 2005 and 2006

Details Magnetic Fields in the Heliosheath and Distant Heliosphere: Voyager 1 and 2 Observations During 2005 and 2006 Magnetic Fields in the Heliosheath and Distant Heliosphere: Voyager 1 and 2 Observations During 2005 and 2006

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...668.1246b&link_type=abstract

The Astrophysical Journal, Volume 668, Issue 2, pp. 1246-1258.

Astronomy and Astrophysics

Astronomy

19

Magnetic Fields, Magnetohydrodynamics: Mhd, Sun: Solar Wind, Turbulence

Scientific paper

This paper examines the variability of daily averages of the magnetic field strength B in the heliosheath and in the distant solar wind measured by Voyager 1 (V1) and Voyager 2 (V2), respectively, from 2005.0 to 2006.9. In the heliosheath, a spatial gradient of (0.0023+/-0.0011) nT AU-1 is observed, which constrains models of the inner heliosheath. This gradent is small compared to the expected average gradient of B across the entire heliosheath. In the heliosheath the profile of B is generally filamentary with numerous jumps, but a large-amplitude sine wave with a period of ~200 days was observed by V1 at the end of the interval. The fluctuations of daily averages of B observed by V1 and V2 have a Gaussian distribution and lognormal distribution, respectively. The autocorrelation of B(t) from day of year (DOY) 1-512 was an exponential function with an e-folding time of ~3.7+/-0.5 days for V1 and 2.5+/-0.3 days for V2. On scales from 1-4 days, the autocorrelation function was a power law with exponent α=-0.440+/-0.031 for V1 and α=-0.497+/-0.002 for V2. The distribution of differences of successive daily averages of B for both V1 and V2 is the Tsallis distribution of nonextensive statistical mechanics with the nonextensivity parameter q=1.55+/-0.05. V2 (at ~S26°) observed both positive and negative magnetic polarities throughout the interval from 2005.0 to 2006.9. There is evidence that V1 (at N34°) might be entering a region of negative magnetic polarity as the latitudinal extent of the heliospheric current sheet decreases during the declining phase of solar cycle 23.

Affiliated with

Also associated with

No associations

Rating

Magnetic Fields in the Heliosheath and Distant Heliosphere: Voyager 1 and 2 Observations During 2005 and 2006 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 Magnetic Fields in the Heliosheath and Distant Heliosphere: Voyager 1 and 2 Observations During 2005 and 2006, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Fields in the Heliosheath and Distant Heliosphere: Voyager 1 and 2 Observations During 2005 and 2006 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-825951