The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release
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 untargeted spectroscopic survey. HDR4 contains 345,874 Integral Field Unit observations from 2017 January to 2023 August covering...
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2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4365/ada4a5 |
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| author | Chenxu Liu Karl Gebhardt Erin Mentuch Cooper Dustin Davis Donald P. Schneider Matt J. Jarvis Daniel J. Farrow Steven L. Finkelstein Óscar A. Chávez Ortiz The HETDEX Collaboration |
| author_facet | Chenxu Liu Karl Gebhardt Erin Mentuch Cooper Dustin Davis Donald P. Schneider Matt J. Jarvis Daniel J. Farrow Steven L. Finkelstein Óscar A. Chávez Ortiz The HETDEX Collaboration |
| author_sort | Chenxu Liu |
| collection | DOAJ |
| description | 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 untargeted spectroscopic survey. HDR4 contains 345,874 Integral Field Unit observations from 2017 January to 2023 August covering an effective area of 62.9 deg ^2 . With no imaging preselection, our spectroscopic confirmed AGN sample includes low-luminosity AGN, narrow-line AGN, and/or red AGN down to g ∼ 25. This catalog has 15,940 AGN across the redshifts of z = 0.1 ∼ 4.6, giving a raw AGN number density of 253.4 deg ^−2 . Among them, 10,499 (66%) have redshifts either confirmed by line pairs or matched to the Sloan Digital Sky Survey Quasar Catalog. For the remaining 5441 AGN, 2083 are single broad-line AGN candidates, while the remaining 3358 are single intermediate broad-line (full width at half-maximum, FWHM ∼1200 km s ^−1 ) AGN candidates. A total of 4060 (39%) of the 10,499 redshift-confirmed AGN have emission-line regions 3 σ more extended than the image quality, which could be strong outflows blowing into the outskirts of the host galaxies or ionized intergalactic medium. |
| format | Article |
| id | doaj-art-4e2adf758d4946ad8ac624332f9d040b |
| institution | Kabale University |
| issn | 0067-0049 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal Supplement Series |
| spelling | doaj-art-4e2adf758d4946ad8ac624332f9d040b2025-02-06T12:13:49ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492025-01-0127627210.3847/1538-4365/ada4a5The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data ReleaseChenxu Liu0https://orcid.org/0000-0001-5561-2010Karl Gebhardt1https://orcid.org/0000-0002-8433-8185Erin Mentuch Cooper2https://orcid.org/0000-0002-2307-0146Dustin Davis3https://orcid.org/0000-0002-8925-9769Donald P. Schneider4https://orcid.org/0000-0001-7240-7449Matt J. Jarvis5https://orcid.org/0000-0001-7039-9078Daniel J. Farrow6https://orcid.org/0000-0003-2575-0652Steven L. Finkelstein7https://orcid.org/0000-0001-8519-1130Óscar A. Chávez Ortiz8https://orcid.org/0000-0003-2332-5505The HETDEX CollaborationSouth-Western Institute for Astronomy Research, Yunnan University , Kunming 650500, People's Republic of China ; cxliu@ynu.edu.cnDepartment of Astronomy, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USADepartment of Astronomy, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USA; McDonald Observatory, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USADepartment of Astronomy, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USADepartment of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USAAstrophysics, Department of Physics, University of Oxford , Keble Road, Oxford, OX1 3RH, UK; Department of Physics and Astronomy, University of the Western Cape , Robert Sobukwe Road, 7535 Bellville, Cape Town, South AfricaCentre of Excellence for Data Science, Artificial Intelligence and Modelling, University of Hull , Cottingham Road, Hull, HU6 7RX, UK; E.A. Milne Centre for Astrophysics, University of Hull , Cottingham Road, Hull, HU6 7RX, UKDepartment of Astronomy, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USADepartment of Astronomy, The University of Texas at Austin , 2515 Speedway, Austin, TX 78712, USAWe 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 untargeted spectroscopic survey. HDR4 contains 345,874 Integral Field Unit observations from 2017 January to 2023 August covering an effective area of 62.9 deg ^2 . With no imaging preselection, our spectroscopic confirmed AGN sample includes low-luminosity AGN, narrow-line AGN, and/or red AGN down to g ∼ 25. This catalog has 15,940 AGN across the redshifts of z = 0.1 ∼ 4.6, giving a raw AGN number density of 253.4 deg ^−2 . Among them, 10,499 (66%) have redshifts either confirmed by line pairs or matched to the Sloan Digital Sky Survey Quasar Catalog. For the remaining 5441 AGN, 2083 are single broad-line AGN candidates, while the remaining 3358 are single intermediate broad-line (full width at half-maximum, FWHM ∼1200 km s ^−1 ) AGN candidates. A total of 4060 (39%) of the 10,499 redshift-confirmed AGN have emission-line regions 3 σ more extended than the image quality, which could be strong outflows blowing into the outskirts of the host galaxies or ionized intergalactic medium.https://doi.org/10.3847/1538-4365/ada4a5Active galactic nuclei |
| spellingShingle | Chenxu Liu Karl Gebhardt Erin Mentuch Cooper Dustin Davis Donald P. Schneider Matt J. Jarvis Daniel J. Farrow Steven L. Finkelstein Óscar A. Chávez Ortiz The HETDEX Collaboration The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release The Astrophysical Journal Supplement Series Active galactic nuclei |
| title | The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release |
| title_full | The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release |
| title_fullStr | The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release |
| title_full_unstemmed | The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release |
| title_short | The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release |
| title_sort | hobby eberly telescope dark energy experiment survey hetdex active galactic nuclei catalog the fourth data release |
| topic | Active galactic nuclei |
| url | https://doi.org/10.3847/1538-4365/ada4a5 |
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