Cosmic ray modulation at the solar maximum: Ulysses observations during the fast latitude scan of the inner heliosphere*

Details Cosmic ray modulation at the solar maximum: Ulysses observations during the fast latitude scan of the inner heliosphere* Cosmic ray modulation at the solar maximum: Ulysses observations during the fast latitude scan of the inner heliosphere*

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh51a..07z&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SH51A-07

Computer Science

Performance

2104 Cosmic Rays, 2134 Interplanetary Magnetic Fields, 2162 Solar Cycle Variations (7536), 2164 Solar Wind Plasma

Scientific paper

Starting at the maximum southern latitude of 80o in November 2000, Ulysses made a fast latitude scan of the inner heliosphere within approximately one year at the time of maximum solar activity. It passed through a perihelion at 1.34 AU near the solar equator in May 2001, and reached its maximum northern latitude in October 2001. The fast latitude scan provides best conditions for the determination of cosmic ray latitudinal gradients because of little expected drift of instrument performance and a small coverage of radial distance (2.2 to 1.34 AU). Although the time period is dominated by solar energetic particle events, measurements from the High-Energy Telescope on the Ulysses COSPIN experiment together with simultaneous measurements from the University of Chicago Charge Particle Telescope on IMP-8 near Earth made during rare solar quiet time periods found that the latitudinal gradient of cosmic ray intensities is essentially zero for all nuclei of energies above 30 MeV/n. Compared to the measurements of small cosmic ray latitude gradients made by Ulysses' first fast latitude scan at the 1994-1995 solar minimum, this observation indicates that the inner heliosphere is more spherically symmetric at the solar maximum. In this paper, we will discuss its implications to the understanding of the structure of heliospheric magnetic fields and the mechanisms of particle transport. * This work was supported in part by NASA Contract JPL-955432 and by NASA Grants NAG5-11036 and NAG5-10888

Affiliated with

Also associated with

No associations

Rating

Cosmic ray modulation at the solar maximum: Ulysses observations during the fast latitude scan of the inner 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 Cosmic ray modulation at the solar maximum: Ulysses observations during the fast latitude scan of the inner heliosphere*, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic ray modulation at the solar maximum: Ulysses observations during the fast latitude scan of the inner heliosphere* will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1723783