Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.
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Transcript of Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.
![Page 1: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/1.jpg)
Periodicities in the Solar Wind
Tenative CSI 763 Research Project
Christina Henderson
![Page 2: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/2.jpg)
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
![Page 3: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/3.jpg)
The Parker Spiral
Image Credit: J. Luhmann
![Page 4: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/4.jpg)
Differential Rotation
Image Credit: SOHO's SOI/MDI
![Page 5: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/5.jpg)
Theoretical Heliospheric Current Sheet
Image credit: NASA artist Werner "Gredoč" Heil
![Page 6: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/6.jpg)
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
![Page 7: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/7.jpg)
Trajectory
![Page 8: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/8.jpg)
“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
![Page 9: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/9.jpg)
Time series - 1992
![Page 10: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/10.jpg)
Time series – 1993
![Page 11: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/11.jpg)
Things to consider
- more data, less data?
- pre-whitening?
- linear interpolation suitable for gaps?
- error bars actually significant?
- F-test?
![Page 12: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649f525503460f94c77013/html5/thumbnails/12.jpg)
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