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Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson

Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson. Outline. Discuss solar wind and solar rotation Parker spiral, differential rotation rates Examine Ulysses spacecraft and data Attempt to reproduce analysis from Roberts and Goldstein paper

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Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson

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  1. Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson

  2. Outline • Discuss solar wind and solar rotation • Parker spiral, differential rotation rates • Examine Ulysses spacecraft and data • Attempt to reproduce analysis from Roberts and Goldstein paper • Additional topics

  3. The Parker Spiral Image Credit: J. Luhmann

  4. Differential Rotation Image Credit: SOHO's SOI/MDI

  5. Theoretical Heliospheric Current Sheet Image credit: NASA artist Werner "Gredoč" Heil

  6. The Ulysses Spacecraft • Purpose: study heliosphere as a function of latitude • Achievements: • Jupiter encounter: June 8, 1992 • High Northern latitudes June through September 1995 (solar minimum) • High Southern latitudes September through December 2001 (solar max.) • Measures: magnetic field, particle density, plasma velocity, cosmic rays, X-rays/gamma rays, radio waves, plasma waves, dust

  7. Trajectory

  8. “Evidence for high-latitude origin of lower latitude high-speed wind” - Roberts & Goldstein (NASA GSFC) performed statistical analyses on Ulysses density, velocity, and magnetic field data - Data analysis exhibited harmonics of fundamental frequencies at 26 and 34 day periods - Found that wind seen within 30° of the solar magnetic equator actually comes from greater than 60°, confirming previous current sheet configuration

  9. Time series - 1992

  10. Time series – 1993

  11. Things to consider - more data, less data? - pre-whitening? - linear interpolation suitable for gaps? - error bars actually significant? - F-test?

  12. Additional Topics • Geomagnetic effects on airline fares • SWx big concern for airlines • Millions lost in rerouting of polar flights • Who pays for this? Likely the consumer • Need to build a data set - web-scraping • Geomagnetivity and rate of heart attacks

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