1 / 74

Supernovas, Dark Energy, and an Accelerating Universe: What Next?

Supernovas, Dark Energy, and an Accelerating Universe: What Next?. Saul Perlmutter Lawrence Berkeley National Laboratory. Abel 370: deep space image. The Thinker. Basic concepts. Me and audience. Sun 8 minutes ago. Nearest star & earth orbit. Nearest galaxy & first evidence of humans.

jacoba
Download Presentation

Supernovas, Dark Energy, and an Accelerating Universe: What Next?

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. Supernovas, Dark Energy, and an Accelerating Universe:What Next? Saul Perlmutter Lawrence Berkeley National Laboratory

  2. Abel 370: deep space image

  3. The Thinker

  4. Basic concepts

  5. Me and audience

  6. Sun 8 minutes ago

  7. Nearest star & earth orbit

  8. Nearest galaxy & first evidence of humans

  9. Nearest clusters & dinosaurs

  10. Abel 370: deep space image

  11. Basic concepts: expanding universe

  12. Picture of Einstein

  13. Einstein 1920 (3 years after)

  14. Prism picture

  15. Frauenhoffer’s spectrum of sun

  16. Through prism

  17. Through prism, redshifted

  18. Doppler shift picture Object approaching: Short BLUE waves Object receding: Long RED waves

  19. Hubble’s original Hubble diagram

  20. Blank Slide Show Transparencies

  21. How fast is this expansion? How much is this expansion? 50 km/sec/Mpc How much growth is this? I grow an angstrom/year But –in fact– things that are bound don’t expand. Photons do!

  22. Basic concepts: Redshift

  23. Stretched wavelengths

  24. Basic concepts: Standard Candle

  25. Hubble’s original Hubble diagram

  26. Candles

  27. Basic concepts: Age of Universe

  28. Blank Slide Show Transparencies

  29. Age from H0 distance between galaxies is growing, but slower, if the universe is decelerating age of the universe age of the universe if it had always expanded at today’s rate

  30. Future possibilities: expand/collapse

  31. Basic concepts

  32. How to measure cosm Finite Borderline More redshift = Faster expansion in past = Expansion is slowing = More mass in universe Empty (More total expansion since light left the Standard Candle) FAINTER (Farther) (Further back in time)

  33. Picture of accretion on WD star

  34. lightcurve MPEG movie

  35. 3-panel MPEG movie

  36. SNe Ia lightcurves (matched)

  37. Through prism

  38. 3-panel MPEG movie

  39. NYT: stretched spectrum matches

  40. Problems with SNe Ia

  41. Strategy (simple)

  42. CTIO site

  43. CTIO 4m dome

  44. Inside CTIO 4m

  45. Blank Slide Show Transparencies

  46. Before/after & HST

  47. Strategy with world

  48. How to measure cosm Finite Borderline Empty Universe Eventually Recollapses (More total expansion since light left the Standard Candle) FAINTER (Farther) (Further back in time)

  49. Our data on Hubble diagram Universe Eventually Recollapses Supernova Cosmology Project (More total expansion since light left the Standard Candle) MORE REDSHIFT Calan/Tololo Survey FAINTER (Farther) relative brightness (Further back in time)

  50. The Implications of an Accelerating Universe

More Related