[ -- Invited ]

Studies of Dark Energy with Chandra

Alexey Vikhlinin, SAO

I will review Chandra's contribution to studies of Dark Energy. Observable effects of Dark Energy fall into two broad classes, its effect on the expansion rate as a function of time, and on the rate of growth of cosmic structures; Chandra has detected and measured both through observations of galaxy clusters. Combination with other cosmological datasets leads to 5\% constraints on the Dark Energy equation of state, and limits possible deviations of gravity on large scales from General Relativity.