1 / 56

Echoes of the Big Bang

Echoes of the Big Bang. Carolin Crawford Gresham Professor of Astronomy . NASA, ESA. Stephen Leshin. Edwin Hubble. Stephen Leshin. Stephen Leshin. l ong wavelength . m icro-wave. γ -rays. X-rays. UV. IR. radio. s hort wavelength . s pace-exploratorium.com.

gary
Télécharger la présentation

Echoes of the Big Bang

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Echoes of the Big Bang Carolin Crawford Gresham Professor of Astronomy NASA, ESA

  2. Stephen Leshin

  3. Edwin Hubble Stephen Leshin

  4. Stephen Leshin

  5. long wavelength micro-wave γ-rays X-rays UV IR radio short wavelength

  6. space-exploratorium.com

  7. The ‘Big Bang’ Georges Lemaitre Fred Hoyle The ‘primeval atom’

  8. Cosmological principle The Universe is isotropic and homogeneous Georges Lemaitre Fred Hoyle NASA/ESA/Illingworth et al

  9. Maddox et al

  10. SDSS / Blanton

  11. 1.8 billion years NASA/ESA

  12. 1.8 billion years 3-4 billion years NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring

  13. Cosmological principle The Universe is isotropic and homogeneous …in time as well as space NASA/ESA/Illingworth et al

  14. Radio source number counts Steady State Universe Time and place are unimportant The distant Universe resembles the local Big Bang Universe Time is important; the Universe changes and evolves The distant Universe is younger than the local Observed distant radio sources as they were in the past count numbers of radio sources at different brightnesses

  15. Martin Ryle ESO/M Kornmesser

  16. George Gamow The origin of the chemical elements NASA/ESA/Nota

  17. The Helium problem NASA/ESA

  18. The discovery of the cosmic microwave background Arno Penzias & Robert Wilson

  19. Intensity 0.03 0.3 3 30 300 Wavelength (cm) NASA

  20. Intensity 0.03 0.3 3 30 300 Wavelength (cm) NASA

  21. COBE 1989 FIRAS NASA

  22. FIRAS Intensity 0.03 0.3 3 30 300 Wavelength (cm) NASA

  23. NASA

  24. COBE Anisotropies DMR Temperature variations = density fluctuations NASA

  25. COBE • John Mather George Smoot NASA

  26. Fermilab

  27. The flatness problem

  28. The horizon problem Addison Wesley

  29. The horizon problem Addison Wesley

  30. CMBR Radiation-dominated era Fermilab

  31. CMBR baryon-radiation fluid Radiation-dominated era Fermilab

  32. Temperature variations = density fluctuations NASA

  33. ordinary matter pulls together under gravity radiation pressure of photonspushes outwards dark matter clusters under gravity the ordinary (baryonic) matter bounces to create oscillations in the density W Hu

  34. Temperature variations = density fluctuations NASA

  35. The Power Spectrum WMAP Hinshaw et al

  36. BOOMERanG experiment

  37. BOOMERanG experiment

  38. BOOMERanG experiment

  39. WMAP 2001 NASA

  40. WMAP COBE NASA

  41. WMAP Hinshaw et al

  42. Dark energy Total matter content (curvature of space) ΩΛ Ωtotal Dark + ordinary matter Ordinary matter Ωbaryons Ωmass Hu & Dodelson

  43. ESO

  44. WMAP age of Universe 13.772±0.059 billion years

  45. v NASA/JPL-Caltech/ESA

More Related