On the origin of 1/f spectrum of magnetic fluctuations in the solar wind

Details On the origin of 1/f spectrum of magnetic fluctuations in the solar wind On the origin of 1/f spectrum of magnetic fluctuations in the solar wind

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...38r&link_type=abstract

International Solar Wind 8 Conference, p. 38

Physics

1

Solar Wind, Magnetic Field Configurations, Frequency Ranges, Sun, Spectrum Analysis, Periodic Variations, High Frequencies, Low Frequencies, Solar Physics, Ulysses Mission, Polar Regions, Helios Satellites, Astronomical Models, Frequency Distribution

Scientific paper

Spacecraft measurements show that the spectrum of magnetic fluctuations in the solar wind can be divided into low- and high frequency parts. The low and high frequency parts are approximately self-similar (follow a power-law) but with different spectral exponents. (There is, in addition, a very low frequency range in which the spectrum is dominated by structures coming directly from the Sun and it is not self-similar.) For the wind coming from the south polar hole the boundary between the low- and high frequency parts is at about 1 hour near 1 AU. The observed exponent of the low-frequency part is approximately -1 . The high frequency spectrum is steeper with an exponent of about -5/3 . The high frequency spectrum is commonly believed to be the result of non-linear interactions of magnetic and velocity perturbations which lead to a turbulent cascade. However, for the low frequency fluctuations, the site of origin (on the Sun, in the solar corona or in the solar wind?) and mechanism of generation remain basically unknown. In this paper we consider the origin of the 1/f spectrum. The analysis of Ulysses data is compared with analysis of Helios data and the results are used to confront possible models of origin of the spectrum.

Affiliated with

Also associated with

No associations

Rating

On the origin of 1/f spectrum of magnetic fluctuations in the solar wind 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 On the origin of 1/f spectrum of magnetic fluctuations in the solar wind, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the origin of 1/f spectrum of magnetic fluctuations in the solar wind will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-759822