The Stars of the HETDEX Survey. I. Radial Velocities and Metal-Poor Stars from Low-Resolution Stellar Spectra
Keith Hawkins, Greg Zeimann, Chris Sneden, Erin Mentuch Cooper, Karl, Gebhardt, Howard E. Bond, Andreia Carrillo, Caitlin M. Casey, Barbara G., Castanheira, Robin Ciardullo, Dustin Davis, Daniel J. Farrow, Steven L., Finkelstein, Gary J. Hill, Andreas Kelz, Chenxu Liu

TL;DR
This paper presents a catalog of low-resolution stellar spectra from the HETDEX survey, demonstrating the ability to measure radial velocities and identify candidate metal-poor stars, thus showcasing the potential of low-resolution spectroscopy for stellar characterization.
Contribution
The paper introduces a new stellar catalog from HETDEX, including radial velocities and metallicity estimates, and identifies new candidate metal-poor stars using low-resolution spectra.
Findings
Radial velocities for ~42,000 stars with 28 km/s precision.
Identification of 416 new candidate metal-poor stars.
Spectra can be used to estimate T_eff, log g, and [Fe/H].
Abstract
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe through low-resolution () spectra of Lyman-Alpha Emitters. In its search for these galaxies, HETDEX will also observe a few 10 stars. In this paper, we present the first stellar value-added catalog within the internal second data release of the HETDEX Survey (HDR2). The new catalog contains 120,571 low-resolution spectra for 98,736 unique stars between spread across the HETDEX footprint at relatively high () Galactic latitudes. With these spectra, we measure radial velocities (RVs) for 42,000 unique FGK-type stars in the catalog and show that the HETDEX spectra are sufficient to constrain these RVs with a 1 precision of 28.0 km/s and bias of 3.5 km/s with…
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