Mapping the sky with a BILLION STARS!

Mapping the sky with a BILLION STARS!

Slides from my talk at Astronomy on Tap: Seattle #39.

We're talking about, what else, Gaia DR2! The how & why of astronomical parallax! Maps of the sky! Show & Tell from some of the neatest results published from Gaia data to date!

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James Davenport

June 27, 2018
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Transcript

  1. mapping the sky with A BILLION STARS! @jradavenport youtube.com/james-davenport Jim

    Davenport, PhD
  2. jradavenport

  3. mapping

  4. Tabula Rogeriana (1154) Muhammad al-Idrisi jradavenport

  5. Fernão Vaz Dourado (1575) jradavenport

  6. Frederik de Wit (1670) jradavenport

  7. jradavenport

  8. Launched in 2013 jradavenport

  9. Gaia lives at “L2” *not to scale jradavenport

  10. Parallax jradavenport

  11. JUNE Parallax jradavenport

  12. JANUARY Parallax jradavenport

  13. JANUARY Parallax jradavenport

  14. JANUARY Parallax jradavenport

  15. Parallax BUT: this is a VERY SMALL angle the LARGEST

    parallax (Alpha Centauri) Take a US Quarter Place it 4 MILES away jradavenport
  16. Parallax BUT: this is a VERY SMALL angle the LARGEST

    parallax (Alpha Centauri) Take a US Quarter Place it 4 MILES away Gaia does ~10,000x better jradavenport
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  20. jradavenport SO WHAT

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  24. https://arxiv.org/abs/1805.04079 M31 M33 jradavenport

  25. https://arxiv.org/abs/1804.11339 New Milky Way streams! (some known, some new, some

    artifacts of Gaia systematics) jradavenport
  26. https://arxiv.org/abs/1805.08023 PanSTARRS image Nearby microlensing of stars jradavenport

  27. https://arxiv.org/abs/1805.07581 Circle size: “impulse” future past Gl710 Passes within 10,700–17,400

    AU 
 in 1.2Myr jradavenport Close passage of nearby stars!
  28. https://arxiv.org/abs/1805.08277 Runaway stars from star forming region jradavenport

  29. https://arxiv.org/abs/1805.04649 Orion’s Head is Exploding! jradavenport

  30. 14,000 asteroids! jradavenport

  31. jradavenport mapping the sky with A BILLION STARS!