Primal Scream:
Sounds from the Infant Universe

Introduction

Last sound first

The Origin of the CMB

The CMB is Young and Far

The Big Bang is all around us !

Observing the
Microwave Background

Three all-sky maps of the CMB

Two ways to view patchiness

Sound waves in the sky

Sound in space !?!

How does sound get to us ?

Nature of Cosmic Sound

An Ultra-Bass Piano

Nature of Cosmic Sound (ii)

Flute power spectra

Sky Maps   à   Power Spectra

CMB Angular Power Spectrum

CMB Sound Spectrum

Why so un-musical ?

Slide 21

How does sound get started ?

The first sound waves

Sound as diagnostic tool

Geometry of the Universe

Geometry ßà Sound Pitch

Atomic content of the Universe

Properties of the Universe

The cosmic concert hall

Slide 30

Slide 31

What’s the Chord ?

Into the fog : yet earlier times

Evolution of Power Spectra : P(k,t)

Growth of Cosmic Sound

Growth of Cosmic Sound

From sound to stars

After Recombination

First 100 Myr

The First Million Years

Quick recap

Sound Waves in the Sky

THE END