Publications (32)
Using Lyman Alpha Absorption to Measure the Intensity and Variability of Ultraviolet Background Light
Laurel H. Weiss, Karl Gebhardt, Dustin Davis +11
We present measurements of ultraviolet background light using Lya absorption from galaxies at in the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX…
The Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: the Fourth Data Release
Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper +7
We present the Active Galactic Nuclei (AGN) catalog from the fourth data release (HDR4) of the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX). HETDEX is an untargete…
The HETDEX Survey: Emission Line Exploration and Source Classification
Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper +20
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an untargeted spectroscopic survey that aims to measure the expansion rate of the Universe at to 1% preci…
The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) I. Sample selection
Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper +16
We present the first Active Galactic Nuclei (AGN) catalog in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) observed between January 2017 and June 2020. HETDEX i…
DESI Spectroscopy of HETDEX Emission-line Candidates I: Line Discrimination Validation
Martin Landriau, Erin Mentuch Cooper, Dustin Davis +50
The Hobby-Eberly Dark Energy Experiment (HETDEX) is an untargeted spectroscopic galaxy survey that uses Ly emitting galaxies (LAEs) as tracers of 1.9 < z < 3.5 large scale stru…
Absorption Troughs of Lyman Alpha Emitters in HETDEX
Laurel H. Weiss, Dustin Davis, Karl Gebhardt +21
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is designed to detect and measure the redshifts of more than one million Ly emitting galaxies (LAEs) between $1.88 <…
Participatory Science and Machine Learning Applied to Millions of Sources in the Hobby-Eberly Telescope Dark Energy Experiment
Lindsay R. House, Karl Gebhardt, Keely Finkelstein +4
We are merging a large participatory science effort with machine learning to enhance the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). Our overall goal is to remove false…
Stellar Populations of Lyman-alpha Emitting Galaxies in the HETDEX Survey I: An Analysis of LAEs in the GOODS-N Field
Adam P. McCarron, Steven L. Finkelstein, Oscar A. Chavez Ortiz +17
We present the results of a stellar-population analysis of Lyman-alpha emitting galaxies (LAES) in GOODS-N at 1.9 < z < 3.5 spectroscopically identified by the Hobby-Eberly Telesco…
HETDEX Public Source Catalog 1 -- Stacking 50K Lyman Alpha Emitters
Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper +25
We describe the ensemble properties of the Lyman Alpha Emitters (LAEs) found in the HETDEX survey's first public data release, HETDEX Public Source Catalog 1 (Mentu…
Correcting correlation functions for redshift-dependent interloper contamination
Daniel J. Farrow, Ariel G. Sánchez, Robin Ciardullo +14
The construction of catalogues of a particular type of galaxy can be complicated by interlopers contaminating the sample. In spectroscopic galaxy surveys this can be due to the mis…
Introducing the Texas Euclid Survey for Lyman Alpha (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyman-Alpha Emission
Oscar A. Chavez Ortiz, Steven L. Finkelstein, Dustin Davis +24
We present the Texas Euclid Survey for Lyman-Alpha (TESLA), a spectroscopic survey in the 10 square degree of the Euclid North Ecliptic Pole (NEP) field. Using TESLA, we study how…
HETDEX Public Source Catalog 1: 220K Sources Including Over 50K Lyman Alpha Emitters from an Untargeted Wide-area Spectroscopic Survey
Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis +43
We present the first publicly released catalog of sources obtained from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). HETDEX is an integral field spectroscopic survey…
Golden and Silver Dark Sirens for precise H0 measurement with HETDEX
Yixuan Dang, Ish Gupta, Robin Ciardullo +12
Gravitational waves (GWs) from compact binary coalescences are standard sirens that provide a direct measure of the source's luminosity distance, enabling an independent measuremen…
First HETDEX Spectroscopic Determinations of Ly and UV Luminosity Functions at : Bridging a Gap Between Faint AGN and Bright Galaxies
Yechi Zhang, Masami Ouchi, Karl Gebhardt +21
We present Ly and ultraviolet-continuum (UV) luminosity functions (LFs) of galaxies and active galactic nuclei (AGN) at determined by the un-targetted optical spect…
Lyα Nebulae in HETDEX: The Largest Statistical Census Bridging Lyα Halos and Blobs across Cosmic Noon
Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis +20
The Hobby-Eberly Dark Energy Experiment (HETDEX) is an untargeted ~540 deg^2 spectroscopic survey of Lyα emission in the 1.9 < z < 3.5 Universe. In surface brightness, this survey…
HETDEX [OII] galaxies at : Volume-limited samples and their power spectra
Jeongin Moon, Eiichiro Komatsu, Robin Ciardullo +15
The catalog from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Public Data Release 1 (PDR1) contains half a million emission-line-selected [OII] galaxies spread across…
Using Dark Energy Explorers and Machine Learning to Enhance the Hobby-Eberly Telescope Dark Energy Experiment
Lindsay R. House, Karl Gebhardt, Keely Finkelstein +11
We present analysis using a citizen science campaign to improve the cosmological measures from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The goal of HETDEX is to…
HETDEX Public Data Release 1: Source Catalog 2 and Data Cubes from ~90 sq deg of Integral-Field Optical Spectroscopy
Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis +36
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is a wide-field, integral-field spectroscopic survey designed to map the large-scale distribution of Lyman-alpha emitting…
HETDEX [OIII] Emitters I: A spectroscopically selected low-redshift population of low-mass, low-metallicity galaxies
Briana Indahl, Greg Zeimann, Gary J. Hill +16
We assemble a sample of 17 low metallicity (7.45 < log(O/H)+12 < 8.12) galaxies with z < 0.1 found spectroscopically, without photometric pre-selection, in early data from the Hobb…
The Stars of the HETDEX Survey. I. Radial Velocities and Metal-Poor Stars from Low-Resolution Stellar Spectra
Keith Hawkins, Greg Zeimann, Chris Sneden +18
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe thr…
The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) III. A red quasar with extremely high equivalent widths showing powerful outflows
Chenxu Liu, Karl Gebhardt, Wolfram Kollatschny +12
We report an Active Galactic Nucleus (AGN) with extremely high equivalent width (EW), EW(LyA+NV,rest)>921 AA in the rest-frame, at z~2.24 in the Hobby-Eberly Telescope Dark Energy…
Cosmological-Scale Lyman-alpha Forest Absorption Around Galaxies and AGN Probed with the HETDEX and SDSS Spectroscopic Data
Dongsheng Sun, Ken Mawatari, Masami Ouchi +12
We present cosmological-scale 3-dimensional (3D) neutral hydrogen ({\sc Hi}) tomographic maps at over a total of 837 deg in two blank fields that are developed with Ly$…
The HETDEX Survey: Probing neutral hydrogen in the circumgalactic medium of ~88,000 Lyman Alpha Emitters
Mahan Mirza Khanlari, Karl Gebhardt, Laurel H. Weiss +12
We explore the neutral hydrogen (H I) gas around 1.9 < z < 3.5 Lyman Alpha Emitters (LAEs) from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) using faint Ly absorp…
Emission-line Variable Active Galactic Nuclei at Cosmic Noon from HETDEX
Chenxu Liu, Fanchuan Kong, Erin Mentuch Cooper +11
We present the first statistical census of emission-line variable active galactic nuclei (EVA) at cosmic noon by combining untargeted and deep HETDEX spectroscopy with multi-epoch…
The Pre-explosion Environments and The Progenitor of SN 2023ixf from the Hobby Eberly Telescope Dark Energy Experiment (HETDEX)
Chenxu Liu, Xinlei Chen, Xinzhong Er +20
Supernova (SN) 2023ixf was discovered on May 19th, 2023. The host galaxy, M101, was observed by the Hobby Eberly Telescope Dark Energy Experiment (HETDEX) collaboration over the pe…
Detection of Lyman Continuum from 3.0 < z < 3.5 Galaxies in the HETDEX Survey
Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper +15
Questions as to what drove the bulk reionization of the Universe, how that reionization proceeded, and how the hard ionizing radiation reached the intergalactic medium remain open…
The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) II. Luminosity Function
Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper +13
We present the LyA emission line luminosity function (LF) of the Active Galactic Nuclei (AGN) in the first release of the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETD…
Cosmological 3D HI Gas Map with HETDEX Ly Emitters and eBOSS QSOs at : IGM-Galaxy/QSO Connection and a 40-Mpc Scale Giant HII Bubble Candidate
Shiro Mukae, Masami Ouchi, Gary J. Hill +20
We present cosmological ( Mpc) distributions of neutral hydrogen (HI) in the inter-galactic medium (IGM) traced by Ly Emitters (LAEs) and QSOs at , selected…
The Stellar Mass - Black Hole Mass Relation at Down to Determined by HETDEX
Yechi Zhang, Masami Ouchi, Karl Gebhardt +14
We investigate the stellar mass - black hole mass () relation with type 1 AGN down to , corresponding t…
Enhancing Lyα Emitter Identification in HETDEX with a Convolutional Neural Network
Shiro Mukae, Erin Mentuch Cooper, Karl Gebhardt +9
We present a deep learning framework to enhance the identification of Ly emitters (LAEs) in the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), an untargeted spectrosco…
Surface Brightness Profile of Lyman- Halos out to 320 kpc in HETDEX
Maja Lujan Niemeyer, Eiichiro Komatsu, Chris Byrohl +18
We present the median-stacked Lyman- surface brightness profile of 968 spectroscopically selected Lyman- emitting galaxies (LAEs) at redshifts in the early data…
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Survey Design, Reductions, and Detections
Karl Gebhardt, Erin Mentuch Cooper, Robin Ciardullo +60
We describe the survey design, calibration, commissioning, and emission-line detection algorithms for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The goal of HETDEX…