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!

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
17. jradavenport
18. jradavenport
19. jradavenport
20. jradavenport SO WHAT
21. jradavenport
22. jradavenport
23. jradavenport
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!