periodicities in the solar wind tenative csi 763 research project christina henderson
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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 - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson](https://reader035.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/html5/thumbnails/7.jpg)
Trajectory
![Page 8: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson](https://reader035.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/html5/thumbnails/9.jpg)
Time series - 1992
![Page 10: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson](https://reader035.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/html5/thumbnails/10.jpg)
Time series – 1993
![Page 11: Periodicities in the Solar Wind Tenative CSI 763 Research Project Christina Henderson](https://reader035.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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.vdocuments.us/reader035/viewer/2022062517/56813cfe550346895da69ffa/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