1. The UW Observational Cosmology Laboratory A Brief Tour

2. Our Focus The Cosmic Microwave Background (as viewed by WMAP)

3. What is the CMB? …A remnant from the BIG BANG

4. Discovery of the CMB Robert Wilson and Arno Penzias, 1964

5. The CMB and the Early Universe The CMB provides clues as how the Universe expanded, or inflated to its current size

6. The CMB and the Early Universe The CMB also provides clues about the composition of the universe…

7. Evolution of the Universe

8. The CMB and Last Scattering

9. Looking Back in Time

10. Gravitational Lensing

11. The Structure of the Universe Early perturbations in the density of matter later give rise to the formation of galaxies…

12. CMB Temperature Fluctuations

13. CMB Polarization

14. The CMB in 3-D

15. CMB Detection Ground-Based Experiments Wilson & Penzias COMPASS http://cmb.physics.wisc.edu/compass.html POLAR http://cmb.physics.wisc.edu/polar/ Balloons MSAM/TopHat http://topweb.gsfc.nasa.gov/ Satellites COBE http://lambda.gsfc.nasa.gov/product/ WMAP http://map.gsfc.nasa.gov/m_mm/ms_status.html

16. CMB Detection: Ground-Based

17. Improved Data Acquisition CMB ~ 1965 COBE ~ 1990 WMAP 2001

18. CMB Detection: Balloons

19. CMB Detection:Satellites COBE WMAP

20. CMB Detection Evolution

21. WMAP Over Many Frequencies K-Band

22. WMAP Over Many Frequencies Ka-Band

23. WMAP Over Many Frequencies Q-Band

24. WMAP Over Many Frequencies V-Band

25. WMAP Over Many Frequencies W-Band 75-110 GHz CMB peaks in this band

26. Wisconsin Experiments Missions: Compass POLAR MBI MBI Instrumentation Beam Mapping Device Design Mount & Pointing Structure Phase Shifters SQUIDS

27. COMPASS

28. POLAR

29. MBI: Electronics

30. Radio Telescopes

31. MBI Beam Mapping

32. MBI Mount and Pointing Structure

33. MBI Phase Shifters

34. MBI SQUIDs

35. UW ObsCos Today

36. Our Fearless Leader Professor Peter Timbie