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KG

Karl Gebhardt

0000-0002-8433-8185
astro-ph.GAastro-phastro-ph.COastro-ph.IMastro-ph.HEastro-ph.SRcond-mat.stat-mechphysics.ed-phphysics.space-ph

On Valency

published · living versions
W_xjwq9yw3·v1 · currentpublished
DESI Spectroscopy of HETDEX Emission-line Candidates I: Line Discrimination Validation
with Martin Landriau, Erin Mentuch Cooper, Dustin Davis, Robin Ciardullo +48
1 version
W_kppczsme·v1published
HETDEX Public Source Catalog 1: 220K Sources Including Over 50K Lyman Alpha Emitters from an Untargeted Wide-area Spectroscopic Survey
W_te93sycm·v1published
The HETDEX Instrumentation: Hobby-Eberly Telescope Wide Field Upgrade and VIRUS
W_abqk423y·v1published
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX): Description and Early Pilot Survey Results

Preprints & journals

190 papers in the corpus · 1994–2026
Population III Host Candidates at z∼2z\sim2: Strong He II λ1640\lambda1640 and Absent UV Metal Lines in HETDEX Lyα\alpha Emitters2609.16134v1 · Mahan Mirza Khanlari, Dustin Davis, Karl Gebhardt et al.2026 · 0 citationsarXiv
A Supermassive Black Hole Mass Measurement in NGC 5102 with Schwarzschild Orbit-superposition Modeling2607.26186v1 · Thomas K. Waters, Kayhan Gultekin, Karl Gebhardt et al.2026 · 0 citationsarXiv
HETDEX [OII] galaxies at z≤0.48z \le 0.48: Volume-limited samples and their power spectra2607.08453v2 · Jeongin Moon, Eiichiro Komatsu, Robin Ciardullo et al.2026 · 0 citationsarXiv
HETDEX Public Data Release 1: Source Catalog 2 and Data Cubes from ~90 sq deg of Integral-Field Optical Spectroscopy2606.04208v1 · Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis et al.2026 · 2 citationsApJS, 284, 67 (2026)
Enhancing Ly{\alpha} Emitter Identification in HETDEX with a Convolutional Neural Network2604.12414v1 · Shiro Mukae, Erin Mentuch Cooper, Karl Gebhardt et al.2026 · 0 citationsarXiv
Emission-line Variable Active Galactic Nuclei at Cosmic Noon from HETDEX2603.18519v1 · Chenxu Liu, Fanchuan Kong, Erin Mentuch Cooper et al.2026 · 1 citationarXiv
Ly{\alpha} Nebulae in HETDEX: The Largest Statistical Census Bridging Ly{\alpha} Halos and Blobs across Cosmic Noon2603.06410v1 · Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis et al.2026 · 5 citationsApJ, 1000, 38 (2026)
Ly{\alpha} Intensity Mapping in HETDEX: Galaxy-Ly{\alpha} Intensity Cross-Power Spectrum2510.11427v2 · Maja Lujan Niemeyer, Eiichiro Komatsu, Jos'e Luis Bernal et al.2025 · 2 citationsApJ 999 177 (2026)
White Dwarfs with Infrared Excess in the HET Dark Energy Experiment2509.12116v1 · Rudy A. Morales, Barbara G. Castanheira, Jayden Blanchard et al.2025 · 1 citationarXiv
The HETDEX Survey: Probing neutral hydrogen in the circumgalactic medium of ~88,000 Lyman Alpha Emitters2507.15942v1 · Mahan Mirza Khanlari, Karl Gebhardt, Laurel H. Weiss et al.2025 · 0 citationsarXiv
Using Lyman Alpha Absorption to Measure the Intensity and Variability of z∼2.4z \sim 2.4 Ultraviolet Background Light2504.13253v1 · Laurel H. Weiss, Karl Gebhardt, Dustin Davis et al.2025 · 4 citationsApJ 983 72 (2025)
DESI Spectroscopy of HETDEX Emission-line Candidates I: Line Discrimination Validation2503.02229v2 · Martin Landriau, Erin Mentuch Cooper, Dustin Davis et al.2025 · 3 citationsApJ 995, 220 (2025)on Valency
The JWST View of Cygnus A: Jet-Driven Coronal Outflow with a Twist2502.06603v1 · Patrick M. Ogle, B. Sebastian, A. Aravindan et al.2025 · 12 citationsarXiv
The Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: the Fourth Data Release2412.19414v1 · Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper et al.2024 · 5 citationsarXiv
The Black Hole Mass and Photometric Components of NGC 48262409.11575v1 · Kayhan Gultekin, Karl Gebhardt, John Kormendy et al.2024 · 0 citationsarXiv
Modeling ALMA Observations of the Warped Molecular Gas Disk in the Red Nugget Relic Galaxy NGC 3842409.08812v1 · Jonathan H. Cohn, Maeve Curliss, Jonelle L. Walsh et al.2024 · 6 citationsarXiv
Participatory Science and Machine Learning Applied to Millions of Sources in the Hobby-Eberly Telescope Dark Energy Experiment2409.08359v1 · Lindsay R. House, Karl Gebhardt, Keely Finkelstein et al.2024 · 3 citationsarXiv
A Stellar Dynamical Mass Measurement of the Supermassive Black Hole in NGC 32582406.14623v2 · Thomas K. Waters, Kayhan Gultekin, Karl Gebhardt et al.2024 · 4 citationsarXiv
Absorption Troughs of Lyman Alpha Emitters in HETDEX2401.02490v1 · Laurel H. Weiss, Dustin Davis, Karl Gebhardt et al.2024 · 0 citationsarXiv
The Pre-explosion Environments and The Progenitor of SN 2023ixf from the Hobby Eberly Telescope Dark Energy Experiment (HETDEX)2311.10400v1 · Chenxu Liu, Xinlei Chen, Xinzhong Er et al.2023 · 14 citationsarXiv
ALMA gas-dynamical mass measurement of the supermassive black hole in the red nugget relic galaxy PGC 111792310.11296v1 · Jonathan H. Cohn, Maeve Curliss, Jonelle L. Walsh et al.2023 · 12 citationsarXiv
HETDEX Public Source Catalog 1 -- Stacking 50K Lyman Alpha Emitters2307.03096v1 · Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper et al.2023 · 11 citationsarXiv
The LIGO HET Response (LIGHETR) Project to Discover and Spectroscopically Follow Optical Transients Associated with Neutron Star Mergers2306.15833v1 · M. J. Bustamante-Rosell, Greg Zeimann, J. Craig Wheeler et al.2023 · 0 citationsarXiv
Revisiting the black hole mass of M87* using VLT/MUSE Adaptive Optics Integral Field Unit data I: Ionized gas kinematics2304.11264v2 · J. Osorno, N. Nagar, T. Richtler et al.2023 · 16 citationsA&A 679, A37 (2023)
Using Dark Energy Explorers and Machine Learning to Enhance the Hobby-Eberly Telescope Dark Energy Experiment2304.07348v1 · Lindsay R. House, Karl Gebhardt, Keely Finkelstein et al.2023 · 8 citationsarXiv
Introducing the Texas Euclid Survey for Lyman Alpha (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyman-Alpha Emission2304.03258v1 · Oscar A. Chavez Ortiz, Steven L. Finkelstein, Dustin Davis et al.2023 · 11 citationsarXiv
The Stellar Mass - Black Hole Mass Relation at z∼2z\sim2 Down to MBH∼107M⊙\mathcal{M}_\mathrm{BH}\sim10^7 M_\odot Determined by HETDEX2303.02929v1 · Yechi Zhang, Masami Ouchi, Karl Gebhardt et al.2023 · 19 citationsarXiv
Identifying Active Galactic Nuclei at z∼3z\sim3 from the HETDEX Survey Using Machine Learning2302.11092v1 · Valentina Tardugno Poleo, Steven Finkelstein, Gene C. K. Leung et al.2023 · 9 citationsarXiv
Cosmological-Scale Lyman-alpha Forest Absorption Around Galaxies and AGN Probed with the HETDEX and SDSS Spectroscopic Data2301.05100v2 · Dongsheng Sun, Ken Mawatari, Masami Ouchi et al.2023 · 2 citationsarXiv
The HETDEX Survey: Emission Line Exploration and Source Classification2301.01799v1 · Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper et al.2023 · 25 citationsarXiv
HETDEX Public Source Catalog 1: 220K Sources Including Over 50K Lyman Alpha Emitters from an Untargeted Wide-area Spectroscopic Survey2301.01826v1 · Erin Mentuch Cooper, Karl Gebhardt, Dustin Davis et al.2023 · 50 citationsarXivon Valency
Searching for Supernovae in HETDEX Data Release 32212.08444v1 · J. Vinko, B. P. Thomas, J. C. Wheeler et al.2022 · 3 citationsarXiv
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 outflows2210.12679v1 · Chenxu Liu, Karl Gebhardt, Wolfram Kollatschny et al.2022 · 4 citationsarXiv
A Search for Lensed Lyman-Alpha Emitters within the Early HETDEX Data Set2210.07249v2 · Isaac H. Laseter, Steven L. Finkelstein, Micaela J. Bagley et al.2022 · 2 citationsarXiv
Stellar Populations of Lyman-alpha Emitting Galaxies in the HETDEX Survey I: An Analysis of LAEs in the GOODS-N Field2208.01660v1 · Adam P. McCarron (UT Austin), Steven L. Finkelstein (UT Austin), Oscar A. Chavez Ortiz (UT Austin) et al.2022 · 13 citationsarXiv
The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) II. Luminosity Function2207.11801v1 · Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper et al.2022 · 8 citationsarXiv
Ly{\alpha} Halos around [O III]-Selected Galaxies in HETDEX2207.11098v1 · Maja Lujan Niemeyer, William P. Bowman, Robin Ciardullo et al.2022 · 17 citationsarXiv
The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX) I. Sample selection2204.13658v2 · Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper et al.2022 · 17 citationsarXiv
Surface Brightness Profile of Lyman-α\alpha Halos out to 320 kpc in HETDEX2203.04826v1 · Maja Lujan Niemeyer, Eiichiro Komatsu, Chris Byrohl et al.2022 · 35 citationsarXiv
Gas inflows in the polar ring of NGC 4111: the birth of an AGN2203.02532v2 · Gabriel R. Hauschild-Roier, Thaisa Storchi-Bergmann, Richard M. McDermid et al.2022 · 8 citationsMonthly Notices of the Royal Astronomical Society, Volume 512, Issue 2, May 2022, Pages 2556-2572
Dynamical analysis of the dark matter and central black hole mass in the dwarf spheroidal Leo I2111.04770v1 · Maria Jose Bustamante-Rosell, Eva Noyola, Karl Gebhardt et al.2021 · 31 citationsApJ vol 921 iss 2 (2021) pg 107
The HETDEX Instrumentation: Hobby-Eberly Telescope Wide Field Upgrade and VIRUS2110.03843v2 · Gary J. Hill, Hanshin Lee, Phillip J. MacQueen et al.2021 · 151 citationsAJ 162 298 (2021)on Valency
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Survey Design, Reductions, and Detections2110.04298v1 · Karl Gebhardt, Erin Mentuch Cooper, Robin Ciardullo et al.2021 · 115 citationsarXiv
Detection of Lyman Continuum from 3.0 < z < 3.5 Galaxies in the HETDEX Survey2107.11319v1 · Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper et al.2021 · 16 citationsarXiv
First HETDEX Spectroscopic Determinations of Lyα\alpha and UV Luminosity Functions at z=2−3z=2-3: Bridging a Gap Between Faint AGN and Bright Galaxies2105.11497v2 · Yechi Zhang, Masami Ouchi, Karl Gebhardt et al.2021 · 31 citationsarXiv
Correcting correlation functions for redshift-dependent interloper contamination2104.04613v2 · Daniel J. Farrow, Ariel G. S'anchez, Robin Ciardullo et al.2021 · 26 citationsarXiv
The HETDEX Survey: The Lyα\alpha Escape Fraction from 3D-HST Emission Line Galaxies at z∼2z \sim 22103.12126v1 · Laurel H. Weiss, William P. Bowman, Robin Ciardullo et al.2021 · 18 citationsarXiv
Astro2020 Science White Paper: Black Holes Across Cosmic Time1904.01447v1 · Kayhan Gultekin, Aaron Barth, Karl Gebhardt et al.2019 · 3 citationsarXiv
Astro2020 Science White Paper: The Local Relics of of Supermassive Black Hole Seeds1903.08670v1 · Jenny E Greene, Aaron Barth (UC Irvine), Andrea Bellini (STScI) et al.2019 · 5 citationsarXiv
Constraining Cosmology with Big Data Statistics of Cosmological Graphs1903.07626v1 · Sungryong Hong, Donghui Jeong, Ho Seong Hwang et al.2019 · 25 citationsarXiv
Career total: at least 495 works. 190 are in this corpus.Showing the 50 most recent.

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