Bennett

Advanced Dark Energy Physics Telescope (ADEPT)
Chuck Bennett (Johns Hopkins)

The ADEPT space mission concept uses the CMB-calibrated sound horizon at decoupling as a "standard ruler" by which to measure both the expansion history of the universe, H(z), and the angular diameter distance, in the redshift range 1<2. ADEPT also measures the luminosity distance of high-redshift Type Ia supernovae in a wavelength and redshift range complementary to surveys from the ground. These three measurements (the Hubble parameter, the angular diameter distance, and the luminosity distance) will be inter-compared to assess the level of systematic errors and provide for robust dark energy results. Results will complement ground-based weak lensing data from programs such as from Pan_STARRS and LSST. Further, the ADEPT measurements will improve the ground-based weak lensing experiments by supplying data that enhances the accuracy of their photometric redshift determinations. From the time of Hubble to the most recent 2dFGRS and SDSS observations, galaxy redshift surveys have produced both seminal and wide-ranging astrophysical advances. The ADEPT survey of 100 million galaxy redshifts across the full sky will be, by far, the largest such survey in history.