BigBOSS: The Ground-Based Stage IV BAO Experiment

The BigBOSS experiment is a proposed DOE-NSF Stage IV ground-based dark energy experiment to study baryon acoustic oscillations (BAO) and the growth of structure with an allsky galaxy redshift survey. The project is designed to unlock the mystery of dark energy using existing ground-based facilities operated by National Optical Astronomy Observatory (NOAO) *. A new 5000-fiber R=5000 spectrograph covering a 3-degree diameter field will measure BAO and redshift space distortions in the distribution of galaxies and hydrogen gas spanning redshifts from 0.2 < z < 3.5. The Dark Energy Task Force figure of merit (DETF FoM) for this experiment is expected to be equal to that of a JDEM mission for BAO with the lower risk and cost typical of a ground-based experiment. This project will enable an unprecedented multi-object spectroscopic capability for the U.S. community through an existing NOAO facility.

NOAO Deep-Wide Field Survey

Image taken from the Kitt Peak 4m Mayall telescope in the NOAO Deep-Wide Field Survey, funded by and in partnership with NOAO/AURA/NSF

* NOAO is the US national center for ground-based nighttime astronomy and is operated by theĀ Association of Universities for Research in Astronomyunder cooperative agreement with theĀ National Science Foundation.