the uw observational cosmology laboratory a brief tour
TRANSCRIPT
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The UWObservational Cosmology Laboratory
A Brief Tour
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Our Focus
The Cosmic Microwave Background(as viewed by WMAP)
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What is the CMB?
…A remnant from the BIG BANG
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Discovery of the CMB
Robert Wilson and Arno Penzias, 1964
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The CMB and the Early Universe
The CMB provides clues as how the Universe expanded, or inflated to its current size
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The CMB and the Early Universe
The CMB also provides clues about the composition of the universe…
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Evolution of the Universe
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The CMB and Last Scattering
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Looking Back in Time
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Gravitational Lensing
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The Structure of the Universe
Early perturbations in the density of matter later give rise to the formation of galaxies…
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CMB Temperature Fluctuations
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CMB Polarization
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The CMB in 3-D
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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
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CMB Detection: Ground-Based
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CMB Detection: Balloons
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CMB Detection:Satellites
• COBE• WMAP
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CMB Detection Evolution
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WMAP Over Many Frequencies
K-Band
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WMAP Over Many Frequencies
Ka-Band
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WMAP Over Many Frequencies
Q-Band
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WMAP Over Many Frequencies
V-Band
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WMAP Over Many Frequencies
W-Band • 75-110 GHz• CMB peaks in this band
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Wisconsin Experiments
Missions:• Compass• POLAR• MBI
MBI Instrumentation• Beam Mapping• Device Design• Mount & Pointing Structure • Phase Shifters• SQUIDS
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COMPASS
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POLAR
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MBI: Electronics
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Radio Telescopes
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MBI Beam Mapping
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MBI Mount and Pointing Structure
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MBI Phase Shifters
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MBI SQUIDs
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UW ObsCos Today
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Our Fearless Leader
Professor Peter Timbie