Dependence of cosmic ray solar daily variation (1st, 2nd and 3rd) on heliomagnetic polarity reversals

Details Dependence of cosmic ray solar daily variation (1st, 2nd and 3rd) on heliomagnetic polarity reversals Dependence of cosmic ray solar daily variation (1st, 2nd and 3rd) on heliomagnetic polarity reversals

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34..469n&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, May 1986, p. 469-482.

Physics

5

Cosmic Rays, Heliosphere, Solar Magnetic Field, Anisotropy, Convection, Harmonic Radiation, Interplanetary Magnetic Fields, Magnetic Poles

Scientific paper

Using 696 station-years of neutron monitor data during the period of 1964-1983 as well as data from muon telescopes at surface and underground stations, a long term variation of cosmic ray solar daily variations (1st, 2nd and 3rd) has been analyzed to study its dependence on the heliomagnetic polarity reversals. It is found that the 1st, 2nd and 3rd harmonic variations show respective counter-clockwise phase shifts on the harmonic dial for the transition from the negative to the positive polarity state. The polarity state is defined as 'positive' ('negative') when the interplanetary magnetic field (IMF) is away (toward) in the Northern Hemisphere and toward (away) in the Southern Hemisphere. It is demonstrated that these phase shifts cannot be explained by one-dimensional diffusion of the pitch angle distribution along the IMF-axis, such as the one presented by Bieber and Pomerantz (1983), but can be explained by three-dimensional treatment of the cosmic ray diffusion-convection in space, developed by Munakata and Nagashima (1986) in considering the drift effect in the heliosphere which was pointed out by Jokipii et al. (1977). According to the theory, the rigidity dependence of the observed phase shift of the 2nd harmonic variation suggests that the power exponent of the rigidity spectrum of the cosmic ray mean free path is less than unity, at least in a rigidity region of about one to several tens of GV.

Affiliated with

Also associated with

No associations

Rating

Dependence of cosmic ray solar daily variation (1st, 2nd and 3rd) on heliomagnetic polarity reversals 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 Dependence of cosmic ray solar daily variation (1st, 2nd and 3rd) on heliomagnetic polarity reversals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dependence of cosmic ray solar daily variation (1st, 2nd and 3rd) on heliomagnetic polarity reversals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1775751