S18A0039abst
S18A0039
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) will study the evolution of dark energy using the power-spectrum of ∼ 1,000,000 Lyα emitting galaxies between 1.9 < z < 3.5. A large suite of integral-field units will obtain R∼800 spectra between 3500 Å and 5500 Å over 300 deg2 of sky (filling factor 1/4.5). Since whatever falls onto the instrument’s 34,000 1.″5 diameter fibers will be measured, this blind survey will generate a unique, unbiased spectral database of over 3 × 106 objects that extends ∼ 5 mag deeper than SDSS. Additional projects facilitated by these data include probing the history of star-formation as a function of environment, understanding Lyα emission in the context of galaxy evolution, and more. Complementary imaging is critical for HETDEX, since continuum detections (or limits) are essential for excluding the foreground [O II] emitters which can contaminate the dark energy measurement. We propose to use Subaru’s Hyper Suprime-Cam to continue our HSC imaging survey of the primary HETDEX field to a 10 σ depth of r = 25.1. When combined with our spectroscopy, these data will enable us to measure the signature of baryonic acoustic oscillations at z ∼ 2.4 and the evolution of dark energy.
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