HETDEX: Measuring Dark Energy at High Redshift

Details HETDEX: Measuring Dark Energy at High Redshift HETDEX: Measuring Dark Energy at High Redshift

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21942402g&link_type=abstract

American Astronomical Society, AAS Meeting #219, #424.02

Astronomy and Astrophysics

Astronomy

Scientific paper

The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is a blind
spectroscopic survey to map the evolution of dark energy using Lyman-alpha emitting galaxies as tracers. The survey instrument, VIRUS, consists of 75 IFUs distributed across the 22-arcmin field of the upgraded 9.2-m HET. Each 50x50 sq. arcsec IFU is made up of 448 1.5-arcsec fibers, and feeds a pair of spectrographs with a fixed bandpass of 350-550 nm and resolving power R 700. Each exposure gathers 33,600 spectra. The baseline survey will deliver spectra of 0.8M LAEs in a 9 cubic Gpc volume with 1.9 < z < 3.5, and 1M [OII] emitters with z < 0.48. We expect to measure both the Hubble parameter and angular diameter distance to better than 1%. HETDEX will provide a unique window on the evolution of dark energy.

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