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The Discovery of Dark Energy. Gerson Goldhaber Physics Department University of California at Berkeley and LBNL. Standard Candles after Calibration. Calibrated Standard Candles. Why are all the Type Ia SNe of nearly the same brightness?.
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The Discovery of Dark Energy Gerson Goldhaber Physics Department University of California at Berkeley and LBNL
Standard Candles after Calibration Calibrated Standard Candles 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 M0(the Chandrasekhar limit) from Mass Transfer Gerson Goldhaber, SFSU Colloquium
Positive Image Dec 28, 1989 Gerson Goldhaber, SFSU Colloquium
Negative Image Jan 23 1990 Gerson Goldhaber, SFSU Colloquium
Superimposed images Gerson Goldhaber, SFSU Colloquium
Supernova Discovery and Measurement Sequence. Gerson Goldhaber, SFSU Colloquium
The Sky in Chile By Chris Smith at Cerro Tololo Gerson Goldhaber, SFSU Colloquium
The Hubble SpaceTelescope \ Gerson Goldhaber, SFSU Colloquium
Expansion History of the Universe 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. Gerson Goldhaber, SFSU Colloquium
Supernova Light Curve and Spectrum Gerson Goldhaber, SFSU Colloquium
SNe Light Curves from the HST and Images 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 Gerson Goldhaber, SFSU Colloquium
Adjusting for Stretch Gerson Goldhaber, SFSU Colloquium
Series of Hubble Curves to allow the Measurement of M Gerson Goldhaber, SFSU Colloquium
Hubble Curves Gerson Goldhaber, SFSU Colloquium
Concordance between SNe, CMB and Clusters M Gerson Goldhaber, SFSU Colloquium
w vs. M (w =p/) Gerson Goldhaber, SFSU Colloquium
Riess et al. 2004 SNe from the HST. Acceleration and earlier Deceleration
Strong Gravitational Lensing Gerson Goldhaber, SFSU Colloquium
First SN discovered in a cluster in this search preliminary Cluster RCS0221-03 at z = 1.02
SNe discovered in ongoing search z=1.316 preliminary z=0.926 preliminary Gerson Goldhaber, SFSU Colloquium