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THE DARK ENERGY SURVEY

THE DARK ENERGY SURVEY. Science Goals: Perform a 5000 sq. deg. survey of the southern galactic cap Map the cosmological density field to z=1 Constrain the Dark Energy parameter w to ~5% with 4 complementary techniques begin to constrain dw/dz New Equipment:

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THE DARK ENERGY SURVEY

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  1. THE DARK ENERGY SURVEY Science Goals: • Perform a 5000 sq. deg. survey of the southern galactic cap • Map the cosmological density field to z=1 • Constrain the Dark Energy parameter w to ~5% with 4 complementary techniques • begin to constrain dw/dz New Equipment: • Replace the PF cage on the CTIO Blanco 4m telescope with a new 2.2 deg. FOV optical CCD camera Time scale: • Instrument Construction 2005-2009 Survey: • 30% of the telescope time from 2009-2013

  2. Blanco Telescope

  3. Conclusions Present to 2009: σ(w) ~ 0.1 (SNE+WMAP combined , ~0.3 alone) • Supernovae: ESSENCE, CFHTLS, HST, SNF, SDSS,…many 100’s of SNe Ia over z ~ 0.1-0.8 • Weak Lensing: Deep Lens, CFHTLS, ...: ~200-1000 sq. deg. deep multi-band imaging • Cluster SZ: APEX, … ~200 sq. deg. survey 2009 to ~ 2014: DES will be in a unique position to constrain w to σ(w) ~ 0.05 using four independent techniques and 1st constraints on dw/dz 2014 and beyond: LST and JDEM will start to reach the next level of cosmological precision: ~1-2% on w and ~5% on dw/dz

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