the discovery of dark energy
Download
Skip this Video
Download Presentation
The Discovery of Dark Energy

Loading in 2 Seconds...

play fullscreen
1 / 33

The Discovery of Dark Energy - PowerPoint PPT Presentation


  • 110 Views
  • Uploaded on

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?.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'The Discovery of Dark Energy' - manny


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
the discovery of dark energy

The Discovery of Dark Energy

Gerson Goldhaber

Physics Department

University of California at Berkeley

and LBNL

why are all the type ia sne of nearly the same brightness
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
Positive Image Dec 28, 1989

Gerson Goldhaber, SFSU Colloquium

slide5

Negative Image Jan 23 1990

Gerson Goldhaber, SFSU Colloquium

slide6

Superimposed images

Gerson Goldhaber, SFSU Colloquium

supernova discovery and measurement sequence
Supernova Discovery and Measurement Sequence.

Gerson Goldhaber, SFSU Colloquium

the sky in chile
The Sky in Chile

By Chris Smith at Cerro Tololo

Gerson Goldhaber, SFSU Colloquium

slide11

The Hubble SpaceTelescope

\

Gerson Goldhaber, SFSU Colloquium

expansion history of the universe
Expansion History of the Universe

Gerson Goldhaber, SFSU Colloquium

discovery of dark energy
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
Supernova Light Curve and Spectrum

Gerson Goldhaber, SFSU Colloquium

sne light curves from the hst and images
SNe Light Curves from the HST and Images

Gerson Goldhaber, SFSU Colloquium

slide16

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
Adjusting for Stretch

Gerson Goldhaber, SFSU Colloquium

slide20

Hubble Curves

Gerson Goldhaber, SFSU Colloquium

concordance between sne cmb and clusters
Concordance between SNe, CMB and Clusters

M

Gerson Goldhaber, SFSU Colloquium

w vs m w p
w vs. M (w =p/)

Gerson Goldhaber, SFSU Colloquium

slide27

Riess et al. 2004 SNe from the HST.

Acceleration and earlier Deceleration

strong gravitational lensing
Strong Gravitational Lensing

Gerson Goldhaber, SFSU Colloquium

first sn discovered in a cluster in this search
First SN discovered in a cluster in this search

preliminary

Cluster RCS0221-03

at z = 1.02

sne discovered in ongoing search
SNe discovered in ongoing search

z=1.316

preliminary

z=0.926

preliminary

Gerson Goldhaber, SFSU Colloquium

ad