S19B0012abst
S19B0012
This is a resubmission of our approved observation S18A-039, which was almost lost due to the bad weather and the severe earthquake. Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unique program to study the evolution of dark energy between 1.9 < z < 3.5, measuring the spatial power spectrum of ∼ 106 Lyα emitters (LAEs) in a ∼9 Gpc3 volume of space. HETDEX conducts a blind ∼300 deg2 survey that obtains spectra for every object that falls onto its array of ∼34,000 fibers in the set of 78 IFUs, and will generate an unbiased spectral database of ∼106 LAEs and ∼106 [OII] emitters that can be further explored for extragalactic studies. Complementary deep imaging is critical for the success of HETDEX, since continuum detections are essential for removing the low-redshift [OII] emitters whose inclusion can produce systematic uncertainties in the dark energy measurements. We propose to continue/complete our HSC deep r-band imaging survey in the ∼300 deg2 primary field of HETDEX with a 10 σ depth of r= 25.1. Our HSC imaging data is combined with the HETDEX spectroscopy data to conduct the equivalent width discrimination for removing the [OII] emitter contaminants, which requires homogeneous imaging coverage over the full HETDEX field.
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