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The complete history of the Universe (abridged) The Big Bang and the Cosmic Microwave Background (With thanks to Angela Taylor)Sutton Trust Summer School.

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Presentation on theme: "The complete history of the Universe (abridged) The Big Bang and the Cosmic Microwave Background (With thanks to Angela Taylor)Sutton Trust Summer School."— Presentation transcript:

1 The complete history of the Universe (abridged) The Big Bang and the Cosmic Microwave Background (With thanks to Angela Taylor)Sutton Trust Summer School 2005 Keith Grainge

2 The Hubble Deep Field

3 Optical Spectra Atoms and molecules absorb and emit at particular frequencies  line spectra. Atoms and molecules absorb and emit at particular frequencies  line spectra. Can learn temperature, density, and chemical composition. Can learn temperature, density, and chemical composition. Also velocity … Also velocity …

4 The Doppler Effect for EM radiation

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6 Hubble, law Hubble’s Law Hubble’s Data (1929) v = H 0 d recession Hubble distance velocity constant

7 Expansion of the Universe (Wayne Hu’s web page: background.uchicago.edu/~whu)

8 Evolution of the Universe Age of Universe (Billion years) Relative size of Universe Flat Universe ‘Big Crunch’ Accelerating Universe -10 Now

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10 Ingredients of the Universe Radiation Dark Matter Ordinary matter Dark Energy

11 Geometry of the Universe ‘Positively’ curved ‘Negatively’ curved Flat

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13 The Cosmic Microwave Background The background is the left over radiation from the Big Bang. It has now cooled to a temperature of 2.7 K

14 The Cosmic Microwave Background Imprint in the background due to the motion of the Earth, about 1 part in 1,000 of the total intensity

15 The Cosmic Microwave Background The ripples in the background correspond to only about one part in 100,000 of the total intensity

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19 Map of SkyPower Spectrum PowerPower PowerPower PowerPower 1/Angular Size

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21 GROUND BASED INSTRUMENTS … INSTRUMENTS …

22 FLYING FROM BALLOONS …

23 PLANCK WMAP – flying now SATELLITE MISSIONS

24 The Very Small Array

25 Observatorio del Teide, Tenerife

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29 VSA RESULTS – Jan 2004

30 VSA Power Spectrum

31 WMAP Power Spectrum (Power) (1/Angle on sky)

32 The Age of the Universe … 13.7 Billion Years

33 Geometry of the Universe … FLAT

34 Ingredients of the Universe …

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36 The local Universe - Galaxies Spiral Galaxy M63 If this were our Galaxy, our Sun would be located about here

37 The Universe on the Largest Scale - the Cambridge APM survey Over 2 million galaxies in direction of the South Galactic pole. The map covers about one tenth of the sky

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39 Structure Formation (Simulation and movie courtesy of Andrey Kravtsov)

40 Interacting Galaxies

41 HST image of colliding galaxies NGC 4038 and NGC 4039

42 Summary  After the Big Bang the Universe was hot and smooth.  As it expanded it cooled.  The CMB is a picture of the Universe when it was only 300,000 years old.  Under the influence of gravity structure has formed.


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