BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1283
DTSTART:20081007T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260506T200033Z
LAST-MODIFIED:20081002T152944Z
LOCATION:6515 Sterling Hall
SUMMARY:Dark Energy and The Hubble Constant\, Astronomy Colloquium\, J
 im Condon\, NRAO
DESCRIPTION:Dark energy (DE) dominates the energy density and future e
 xpansion of the universe\, and its nature is a major unsolved problem 
 for theoretical physics. The equation-of-state and energy density of D
 E can be constrained observationally by comparing an accurate (< 3% rm
 s) value of the Hubble constant with the known distance to the last-sc
 attering surface of the cosmic microwave background. The Megamaser Cos
 mology Project (MCP) is now measuring geometric distances to water mas
 ers in the nuclei of distant Seyfert galaxies in order to obtain an ac
 curate value of H0 free from the systematic errors associated with "st
 andard candles." I will review the effect of DE on the Hubble constant
  and present the latest MCP results.
URL:https://www.physics.wisc.edu/events/?id=1283
END:VEVENT
END:VCALENDAR