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The Mystery of Dark Matter Perimeter Explorations 01

Engage in a collaborative lab to determine mass using speed in circular motion. Explore the connection between orbital speed and mass, and its link to dark matter mysteries. Get insights on dark matter through scientific observations and theoretical discussions.

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The Mystery of Dark Matter Perimeter Explorations 01

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  1. The Mystery of Dark Matter Perimeter Explorations 01 CERN HST2019

  2. Uniform Circular Motion Predict Observe Explain How are mass and speed connected in circular motion? speed mass

  3. Uniform Circular Motion Objective: Determine the mass of an unknown item. • Collect data. • Plot a graph of speed2 vs mass on your white boards. • Using your plot, determine the mass of the unknown object.

  4. Circular Motion Lab Collaborative version: • Set radius = 60 cm • Use assigned masses • Record period for 10 orbits • Compare results • Report results

  5. Circular Motion Lab Results How is the orbital speed related to the mass of the washers?

  6. Circular Motion Lab Results

  7. Uniform Circular Motion Theory vs. Observation  Connection to Dark Matter

  8. Uniform Circular Motion Vera Rubin’s Discovery

  9. Uniform Circular Motion Download the Mystery of Dark Matter resource and video at: https://resources.perimeterinstitute.ca/

  10. Uniform Circular Motion Orbital Speed Depends on the Mass of the Central Object

  11. Extend this to galaxies

  12. Triangulum is More Massive Than it Looks

  13. The same discrepancy happens in all galaxies

  14. Old View

  15. New View

  16. Dark Matter 26.8% Normal Matter 4.9% Dark Energy 68.3%

  17. Competing Theories For Dark Matter What’s The Latest?

  18. Lux- Large Underground Xenon Detector Homestake Mine, South Dakota

  19. LUX update (2017) With roughly fourfold improvement in sensitivity for high WIMP masses relative to our previous results, this search yields no evidence of WIMP nuclear recoils. arXiv:1608.07648v3

  20. XENON1T most sensitive measurement yet No significant excess over background is found. arxiv.org/abs/1805.12562

  21. FERMI Detects ɣ-rays DM particle annihilation

  22. LHC

  23. Empty-Handed?

  24. LIGO prefers a dark matter particle

  25. Modified Gravity Theories

  26. New paper by Turok, et al…

  27. Lots of new possibilities… Mirrorverse Fuzzy balls Dark EM ???

  28. Current Status of Dark Matter Download the Mystery of Dark Matter resource and video at: https://resources.perimeterinstitute.ca/

  29. Thank You!! www.perimeterinstitute.ca Laura Pankratz lpankratz@pitp.ca Dave Fish dfish@pitp.ca @DaveFishPI

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