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The Discovery of Dark Energy Gerson Goldhaber Physics Department University of California at Berkeley and LBNL.

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Presentation on theme: "The Discovery of Dark Energy Gerson Goldhaber Physics Department University of California at Berkeley and LBNL."— Presentation transcript:

1 The Discovery of Dark Energy Gerson Goldhaber Physics Department University of California at Berkeley and LBNL

2 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Calibrated Standard Candles Standard Candles after Calibration

3 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Why are all the Type Ia SNe of nearly the same brightness? When a star of near Solar Mass uses up all of its Hydrogen and Helium it collapses to a White Dwarf. (W.D.) If the White Dwarf has a companion star then, for the right conditions, Mass can be Transferred to the W.D. Type Ia SNe are due to the explosion of a W.D. This occurs when it reaches a mass of 1.4 M 0 (the Chandrasekhar limit) from Mass Transfer

4 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Positive Image Dec 28, 1989

5 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Negative Image Jan 23 1990

6 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Superimposed images

7 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Supernova Discovery and Measurement Sequence.

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9 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium

10 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium The Sky in Chile By Chris Smith at Cerro Tololo

11 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium \ The Hubble SpaceTelescope

12 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Expansion History of the Universe

13 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Discovery of Dark Energy A Supernova explodes and the light reaches us some 9 billion years later. The light started out about 4.5 billion years before our solar system was formed.

14 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Supernova Light Curve and Spectrum

15 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium SNe Light Curves from the HST and Images

16 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Type Ia SNe and the Expansion of the Universe Observation of Time Dilation negates “Tired Light” 1/(1+z) 1/(1+z)s

17 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Adjusting for Stretch

18 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Series of Hubble Curves to allow the Measurement of  M

19 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium

20 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Hubble Curves

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22 Sullivan et al. 2003 Elliptical Galaxies contain less Dust

23 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Concordance between SNe, CMB and Clusters MM

24 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium w vs.  M (w =p/  )

25 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium

26 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium

27 Riess et al. 2004 SNe from the HST. Acceleration and earlier Deceleration

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29 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium Strong Gravitational Lensing

30 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium

31 Nov. 21, 2005 First SN discovered in a cluster in this search Cluster RCS0221-03 at z = 1.02 preliminary

32 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium SNe discovered in ongoing search z=0.926 z=1.316 preliminary

33 Nov. 21, 2005 Gerson Goldhaber, SFSU Colloquium

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