The Quest for Dark Matter with the XENON Experiment
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Elena Aprile Columbia University
Milos Conference, May 22, 2008 What is the Universe made of?
Atoms Dark Matter
>95 % UNKNOWN Dark Energy
Dark Matter in Galaxy Clusters
Gravity of the stars not enough to hold clusters together. Clusters must be held together by gravity of unseen DM Dark Matter in Galaxy Clusters
Quasar Galaxy Cluster => All cluster mass measurements Dark give Ωm > 0.15, so majority of mass Matter must be some new non-baryonic form (remembering Ωb ~ 0.05)
Earth
HST Image (1994) (Dark Matter) M-Reconstruction Dark Matter in Galaxies
Inferred from Flat Rotation Curves
First Measurement: Vera Rubin . !BB %INE VON DER 3EITE wEDGE ONi BETRACHTETE 'ALA XIE MIT 7ARP "ILD 2 "OTTEMA
0 !BB 3CHEIBENGALAXIEN LASSEN SICH MITTELS EINES 4ILTED 2ING -ODELLS DARSTELLEN "ILD 9 2E VAZ 'ENF
Z
Y
X
0 !BB $IE &ORM