Astr 328 Mar 26, 2003: Cosmic Background Radiation  

This and subsequent lectures on the CMB borrow extensively from Wayne Hu's excellent web page at http://background.uchicago.edu/~whu/physics/physics.html


Wayne Hu CMB introduction

Before reionization, universe is opaque, matter and radiation tightly coupled

What temperature does recombination happen at? Why so cool?

Photons outnumber baryons by a factor of about 10**9

Hu temperature map: the world at COBE resolution

Hu temperature map: COBE CMB monopole

Hu temperature map: COBE CMB dipole

Hu temperature map: COBE noise

Hu temperature map: Power spectrum

Hu temperature map: Maxima and Boomerang

Hu temperature map: Power spectrum circa 2000

CBR fluctuations

Horizon scales and initial conditions

The structures we see today grew from tiny density fluctuations in the early universe

Sachs-Wolfe effect: gravitational redshift

Acoustic oscillations

What causes this acoustic oscillations?

Potential wells and hills

Seeing sound

Harmonic modes

Harmonic extrema