A ~1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere

Details A ~1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere A ~1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1367k&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue A10, pp. SSH 4-1, CiteID 1367, DOI 10.1029/2003JA009897

Physics

8

Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Corotating Streams, Interplanetary Physics: Solar Cycle Variations (7536), Interplanetary Physics: Instruments And Techniques

Scientific paper

The wavelet transform technique has been applied to investigate the periodicities longer than a year in cosmic ray intensity variations observed at the Voyager spacecraft and at the Earth. We found significant ~1.7- and ~1.3-year periodic components in the cosmic ray intensity variation in the outer heliosphere during the 1980s (solar cycle 21) and the 1990s (solar cycle 22), respectively. This property is consistent with the result of the wavelet analysis of the cosmic ray intensity variations observed at several Neutron Monitors (NMs) and also with previous reports about these periodicities using several plasma parameters, such as the solar wind speed and geomagnetic indices, for example. As comparing with the interplanetary magnetic field (IMF) and solar flare indices, causal relation between energy release from the Sun and the ~1.7-year quasi-periodicity is suggested.

Affiliated with

Also associated with

No associations

Rating

A ~1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere 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 A ~1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A ~1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1032716