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The Revolution for the Rest of Us George Musser 6 October 2006

The Revolution for the Rest of Us George Musser 6 October 2006. Zooming Out. Source: Millennium Simulation (http://www.mpa-garching.mpg.de/galform/millennium/). Zooming Out. Source: Millennium Simulation (http://www.mpa-garching.mpg.de/galform/millennium/). The (Very) Big Picture.

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The Revolution for the Rest of Us George Musser 6 October 2006

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  1. The Revolution for the Rest of UsGeorge Musser6 October 2006

  2. Zooming Out Source: Millennium Simulation (http://www.mpa-garching.mpg.de/galform/millennium/)

  3. Zooming Out Source: Millennium Simulation (http://www.mpa-garching.mpg.de/galform/millennium/)

  4. The (Very) Big Picture

  5. Our Lineage

  6. Cosmic Lineage

  7. Expansion of Space

  8. Thinning Out

  9. Formation of Coherent Bodies

  10. The “Revolution”

  11. Four Pillars of Big Bang Theory • Galaxy recession (expansion of space) • Cosmic microwave background radiation • Abundance of light chemical elements • Arrangement of galaxies

  12. Pillar #1: Expansion Rate Is It Slow? Or Fast? H0=55 km/s/Mpc H0=86 km/s/Mpc Sources: Sandage, ApJ307:1 (1986); de Vaucouleurs, PNAS90:4811 (1993)

  13. Resolving the Dispute Source: Freedman et al. (astro-ph/0012376)

  14. Resolving the Dispute Source: Freedman et al. (astro-ph/0012376)

  15. Past Expansion Rate

  16. Past Expansion Rate Source: Saul Perlmutter, Physics Today, April 2003

  17. Decelerating

  18. Decelerating Accelerating

  19. Pillar #2: Afterglow

  20. Size of observable universe at 400,000 yr COBE resolution Source: WMAP Science Team (http://map.gsfc.nasa.gov/m_or/mr_media2.html)

  21. Lots of Spots Venti Grande Tall Source: http://space.mit.edu/home/tegmark/wmap3.html

  22. Pillar #3: Nucleosynthesis Source: 2006 Particle Data Book (http://pdg.lbl.gov/2006/reviews/bigbangnucrpp.pdf)

  23. Pillar #4: Large-Scale Structure Adapted from Gott et al. (astro-ph/0310571)

  24. Master Power Spectrum Source: Max Tegmark (http://space.mit.edu/home/tegmark/sdss.html)

  25. Spots Reprise Source: Eisenstein et al., ApJ633:560 (2005)

  26. Concordance Model • How much stuff is there? • What kinds of stuff? • What is it doing?

  27. How Much Stuff?The Omega Problem Theorists: Ω = 1 Observers: Ω ~ 0.3 Cluster 0024+1645 Source: http://hubblesite.org/newscenter/newsdesk/archive/releases/1996/10/image/a

  28. Settling the Omega Dispute Source: Tegmark et al. (astro-ph/0608632)

  29. What Kinds of Stuff? Source: Ostriker & Steinhardt, Sci Am Jan 2001

  30. Radiation Era and Matter Era

  31. Overall Composition Source: Ostriker & Steinhardt, Sci Am Jan 2001

  32. Time Dark Matter Is Boring. Good! Ordinary matter Dark matter Radiation Era Matter Era Density contrast Atoms form 60 kyr 400 kyr Adapted from slide by Seb Oliver (http://astronomy.sussex.ac.uk/~sjo/teach/dist2003/lecture19-lss/lecture19.ppt)

  33. Without DM, Galaxies Are Toast 28% dark, 3% ordinary 19%, 12% 16%, 16% 0%, 30% Source: Max Tegmark (http://space.mit.edu/home/tegmark/movies_60dpi/fb_movie.html)

  34. Source: Sean Carroll (http://cosmicvariance.com/wp-images/dmmotivator_01.jpg)

  35. Overall Composition Source: Ostriker & Steinhardt, Sci Am Jan 2001

  36. The Dark Energy Era

  37. Cosmic Eras Radiation Era Matter Era Dark Energy Era

  38. Cosmic Eras Inflation Era Radiation Era Matter Era Dark Energy Era

  39. Structure Formation Source: Andrey Kravtsov (http://cosmicweb.uchicago.edu/filaments.html) Scale: 140 Mlyr

  40. Summary So Far • Precision observations • Tidy end to old debates • Dark energy given a catchy name But Is It Really a “Revolution”? • Same model (big bang + inflation) • Same theoretical basis (relativity) • Same types of observations (pillars)

  41. From Annie Hall What’s the Cultural Impact? From Entretiens sur la pluralité des mondes, Bernard le Bovier de Fontenelle, 1686

  42. Large Hadron Collider Cosmology  Fundamental Physics • Mysteries • The Great Big Particle Accelerator in the Sky

  43. Cosmology  Fundamental Physics • Mysteries • The Great Big Particle Accelerator in the Sky • The Great Big Microscope in the Sky

  44. Simpler The Tree of Physics

  45. Hierarchy of Scaleaka The devil isn’t in the details.

  46. Holographic Principle

  47. Possibility vs. Actualityaka What can be, is. (Or is it?)

  48. The Oddities of an Infinite (or Very Large) Space

  49. What do the laws of physics require, and what do they simply allow? • What is mandated, and what is happenstance? • What does happenstance mean, anyway? • If everything that is possible doesn’t happen, then what makes the choice?

  50. You are here Cosmic Coincidence

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