Gaia DR2 (at Flatiron CCA)

Gaia DR2 (at Flatiron CCA)

Just a few irresponsibly and unfairly chosen highlights

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David W Hogg

May 10, 2018
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  1. Gaia DR2 David W. Hogg NYU / MPIA / Flatiron

  2. Gaia • ESA. • 7-year (+3 more?) mission at L2.

    • Scanning like a CMB mission. • ~2 billion stars, 0.01-mas precision at bright magnitudes. • 5-parameter solution and photometry for “all”. • RV, R=100, spectrophotometry, R=20,000 Ca-triplet for large subsamples. • Millions of astrometric binaries, tens of thousands of exoplanets. • Two telescopes separated by 109 deg focus on the same focal plane. ◦ Why?
  3. Gaia DR2 • 2018 April 25 • 1.7 billion stars

    with positions and G mag • 1.3 billion with 5-parameter solutions and B-R color. • Millions with RV. • Variable-star catalog. • About 30 associated papers but NO guaranteed science for the team. ◦ They get it when the world gets it.
  4. Gaia at Flatiron • 75 people came for DR2 zero

    days: 2018 April 25, 26, 27. ◦ (4 papers already, many more in preparation.) • Largest locale for Gaia-data requests outside of Europe. • 5 reporters and 7-ish news stories. ◦ Best story: SciAm blog post by Lee Billings: https://blogs.scientificamerican.com/observations/the-milky-way-revealed-as-never-before/ • 90 will come for (the third) #GaiaSprint 2018 June 4 5 6 7 8 ◦ (and we have reserved Flatiron 3, 4, 5, 6!)
  5. Gaia Collaboration

  6. Gaia Collaboration

  7. Schiminovich & Lang

  8. Schiminovich & Lang

  9. Bedell, Lang, & Hogg

  10. Gaia Collaboration

  11. Ness et al

  12. Hattori et al

  13. Antoja et al

  14. Price-Whelan & Bonaca

  15. Malhan, Ibata, & Martin

  16. Belokurov