JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744
Recent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at z _phot ≃ 7.6, triply imaged by the galaxy cluster A2744 ( z _d = 0.308). All three images are very compact, i.e., unresolved, with a delensed size upper limit of r _e ≲ 35 pc. The images have ap...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acdc9d |
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| author | Lukas J. Furtak Adi Zitrin Adèle Plat Seiji Fujimoto Bingjie Wang Erica J. Nelson Ivo Labbé Rachel Bezanson Gabriel B. Brammer Pieter van Dokkum Ryan Endsley Karl Glazebrook Jenny E. Greene Joel Leja Sedona H. Price Renske Smit Daniel P. Stark John R. Weaver Katherine E. Whitaker Hakim Atek Jacopo Chevallard Emma Curtis-Lake Pratika Dayal Anna Feltre Marijn Franx Yoshinobu Fudamoto Danilo Marchesini Lamiya A. Mowla Richard Pan Katherine A. Suess Alba Vidal-García Christina C. Williams |
| author_facet | Lukas J. Furtak Adi Zitrin Adèle Plat Seiji Fujimoto Bingjie Wang Erica J. Nelson Ivo Labbé Rachel Bezanson Gabriel B. Brammer Pieter van Dokkum Ryan Endsley Karl Glazebrook Jenny E. Greene Joel Leja Sedona H. Price Renske Smit Daniel P. Stark John R. Weaver Katherine E. Whitaker Hakim Atek Jacopo Chevallard Emma Curtis-Lake Pratika Dayal Anna Feltre Marijn Franx Yoshinobu Fudamoto Danilo Marchesini Lamiya A. Mowla Richard Pan Katherine A. Suess Alba Vidal-García Christina C. Williams |
| author_sort | Lukas J. Furtak |
| collection | DOAJ |
| description | Recent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at z _phot ≃ 7.6, triply imaged by the galaxy cluster A2744 ( z _d = 0.308). All three images are very compact, i.e., unresolved, with a delensed size upper limit of r _e ≲ 35 pc. The images have apparent magnitudes of m _F444W ∼ 25−26 AB, and the magnification-corrected absolute UV magnitude of the source is M _UV,1450 = −16.81 ± 0.09. From the sum of observed fluxes and from a spectral energy distribution (SED) analysis, we obtain estimates of the bolometric luminosities of the source of L _bol ≳ 10 ^43 erg s ^−1 and L _bol ∼ 10 ^44 –10 ^46 erg s ^−1 , respectively. Based on its compact, point-like appearance, its position in color–color space, and the SED analysis, we tentatively conclude that this object is a UV-faint dust-obscured quasar-like object, i.e., an active galactic nucleus at high redshift. We also discuss other alternative origins for the object’s emission features, including a massive star cluster, Population III, supermassive, or dark stars, or a direct-collapse black hole. Although populations of red galaxies at similar photometric redshifts have been detected with JWST, this object is unique in that its high-redshift nature is corroborated geometrically by lensing, that it is unresolved despite being magnified—and thus intrinsically even more compact—and that it occupies notably distinct regions in both size–luminosity and color–color space. Planned UNCOVER JWST/NIRSpec observations, scheduled in Cycle 1, will enable a more detailed analysis of this object. |
| first_indexed | 2024-03-12T02:58:21Z |
| format | Article |
| id | doaj.art-ad61ac92851b4518b0a8cf8d3aff15dd |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T02:58:21Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-ad61ac92851b4518b0a8cf8d3aff15dd2023-09-03T15:08:39ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01952214210.3847/1538-4357/acdc9dJWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744Lukas J. Furtak0https://orcid.org/0000-0001-6278-032XAdi Zitrin1https://orcid.org/0000-0002-0350-4488Adèle Plat2https://orcid.org/0000-0003-0390-0656Seiji Fujimoto3https://orcid.org/0000-0001-7201-5066Bingjie Wang4https://orcid.org/0000-0001-9269-5046Erica J. Nelson5https://orcid.org/0000-0002-7524-374XIvo Labbé6https://orcid.org/0000-0002-2057-5376Rachel Bezanson7https://orcid.org/0000-0001-5063-8254Gabriel B. Brammer8https://orcid.org/0000-0003-2680-005XPieter van Dokkum9https://orcid.org/0000-0002-8282-9888Ryan Endsley10https://orcid.org/0000-0003-4564-2771Karl Glazebrook11https://orcid.org/0000-0002-3254-9044Jenny E. Greene12https://orcid.org/0000-0002-5612-3427Joel Leja13https://orcid.org/0000-0001-6755-1315Sedona H. Price14https://orcid.org/0000-0002-0108-4176Renske Smit15https://orcid.org/0000-0001-8034-7802Daniel P. Stark16https://orcid.org/0000-0001-6106-5172John R. Weaver17https://orcid.org/0000-0003-1614-196XKatherine E. Whitaker18https://orcid.org/0000-0001-7160-3632Hakim Atek19https://orcid.org/0000-0002-7570-0824Jacopo Chevallard20https://orcid.org/0000-0002-7636-0534Emma Curtis-Lake21https://orcid.org/0000-0002-9551-0534Pratika Dayal22https://orcid.org/0000-0001-8460-1564Anna Feltre23https://orcid.org/0000-0001-6865-2871Marijn Franx24https://orcid.org/0000-0002-8871-3026Yoshinobu Fudamoto25https://orcid.org/0000-0001-7440-8832Danilo Marchesini26https://orcid.org/0000-0001-9002-3502Lamiya A. Mowla27https://orcid.org/0000-0002-8530-9765Richard Pan28https://orcid.org/0000-0002-9651-5716Katherine A. Suess29https://orcid.org/0000-0002-1714-1905Alba Vidal-García30https://orcid.org/0000-0001-6798-9202Christina C. Williams31https://orcid.org/0000-0003-2919-7495Physics Department, Ben-Gurion University of the Negev , P.O. Box 653, Be’er-Sheva 84105, Israel ; furtak@post.bgu.ac.ilPhysics Department, Ben-Gurion University of the Negev , P.O. Box 653, Be’er-Sheva 84105, Israel ; furtak@post.bgu.ac.ilSteward Observatory, University of Arizona , 933 N Cherry Ave, Tucson, AZ 85721, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Computational & Data Sciences, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USADepartment for Astrophysical and Planetary Science, University of Colorado , Boulder, CO 80309, USACentre for Astrophysics and Supercomputing, Swinburne University of Technology , Melbourne, VIC 3122, AustraliaDepartment of Physics and Astronomy and PITT PACC, University of Pittsburgh , Pittsburgh, PA 15260, USACosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , Jagtvej 128, København N, DK-2200, DenmarkDepartment of Astronomy, Yale University , New Haven, CT 06511, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USACentre for Astrophysics and Supercomputing, Swinburne University of Technology , Melbourne, VIC 3122, AustraliaDepartment of Astrophysical Sciences, 4 Ivy Lane, Princeton University , Princeton, NJ 08544, USADepartment of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Computational & Data Sciences, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USADepartment of Physics and Astronomy and PITT PACC, University of Pittsburgh , Pittsburgh, PA 15260, USAAstrophysics Research Institute, Liverpool John Moores University , 146 Brownlow Hill, Liverpool, L3 5RF, UKSteward Observatory, University of Arizona , 933 N Cherry Ave, Tucson, AZ 85721, USADepartment of Astronomy, University of Massachusetts , Amherst, MA 01003, USACosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , Jagtvej 128, København N, DK-2200, Denmark; Department of Astronomy, University of Massachusetts , Amherst, MA 01003, USAInstitut d’Astrophysique de Paris, CNRS, Sorbonne Université , 98bis Boulevard Arago, F-75014, Paris, FranceDepartment of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UKCentre for Astrophysics Research, Department of Physics, Astronomy and Mathematics, University of Hertfordshire , Hatfield, AL10 9AB, UKKapteyn Astronomical Institute, University of Groningen , P.O. Box 800, 9700 AV Groningen, The NetherlandsINAF—Osservatorio di Astrofisica e Scienza dello Spazio , Via Gobetti 93/3, I-40129, Bologna, ItalyLeiden Observatory, Leiden University , P.O.Box 9513, NL-2300 AA Leiden, The NetherlandsWaseda Research Institute for Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan; National Astronomical Observatory of Japan , 2-21-1, Osawa, Mitaka, Tokyo, JapanDepartment of Physics and Astronomy, Tufts University , 574 Boston Ave., Medford, MA 02155, USADunlap Institute for Astronomy and Astrophysics , 50 St. George Street, Toronto, Ontario, M5S 3H4, CanadaDepartment of Physics and Astronomy, Tufts University , 574 Boston Ave., Medford, MA 02155, USADepartment of Astronomy and Astrophysics, University of California, Santa Cruz , 1156 High Street, Santa Cruz, CA 95064 USA; Kavli Institute for Particle Astrophysics and Cosmology and Department of Physics, Stanford University , Stanford, CA 94305, USAObservatorio Astronómico Nacional , C/ Alfonso XII 3, E-28014 Madrid, SpainSteward Observatory, University of Arizona , 933 N Cherry Ave, Tucson, AZ 85721, USA; NSF's National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USARecent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at z _phot ≃ 7.6, triply imaged by the galaxy cluster A2744 ( z _d = 0.308). All three images are very compact, i.e., unresolved, with a delensed size upper limit of r _e ≲ 35 pc. The images have apparent magnitudes of m _F444W ∼ 25−26 AB, and the magnification-corrected absolute UV magnitude of the source is M _UV,1450 = −16.81 ± 0.09. From the sum of observed fluxes and from a spectral energy distribution (SED) analysis, we obtain estimates of the bolometric luminosities of the source of L _bol ≳ 10 ^43 erg s ^−1 and L _bol ∼ 10 ^44 –10 ^46 erg s ^−1 , respectively. Based on its compact, point-like appearance, its position in color–color space, and the SED analysis, we tentatively conclude that this object is a UV-faint dust-obscured quasar-like object, i.e., an active galactic nucleus at high redshift. We also discuss other alternative origins for the object’s emission features, including a massive star cluster, Population III, supermassive, or dark stars, or a direct-collapse black hole. Although populations of red galaxies at similar photometric redshifts have been detected with JWST, this object is unique in that its high-redshift nature is corroborated geometrically by lensing, that it is unresolved despite being magnified—and thus intrinsically even more compact—and that it occupies notably distinct regions in both size–luminosity and color–color space. Planned UNCOVER JWST/NIRSpec observations, scheduled in Cycle 1, will enable a more detailed analysis of this object.https://doi.org/10.3847/1538-4357/acdc9dHigh-redshift galaxiesLow-luminosity active galactic nucleiReionizationStrong gravitational lensing |
| spellingShingle | Lukas J. Furtak Adi Zitrin Adèle Plat Seiji Fujimoto Bingjie Wang Erica J. Nelson Ivo Labbé Rachel Bezanson Gabriel B. Brammer Pieter van Dokkum Ryan Endsley Karl Glazebrook Jenny E. Greene Joel Leja Sedona H. Price Renske Smit Daniel P. Stark John R. Weaver Katherine E. Whitaker Hakim Atek Jacopo Chevallard Emma Curtis-Lake Pratika Dayal Anna Feltre Marijn Franx Yoshinobu Fudamoto Danilo Marchesini Lamiya A. Mowla Richard Pan Katherine A. Suess Alba Vidal-García Christina C. Williams JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744 The Astrophysical Journal High-redshift galaxies Low-luminosity active galactic nuclei Reionization Strong gravitational lensing |
| title | JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744 |
| title_full | JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744 |
| title_fullStr | JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744 |
| title_full_unstemmed | JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744 |
| title_short | JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744 |
| title_sort | jwst uncover extremely red and compact object at z phot ≃ 7 6 triply imaged by a2744 |
| topic | High-redshift galaxies Low-luminosity active galactic nuclei Reionization Strong gravitational lensing |
| url | https://doi.org/10.3847/1538-4357/acdc9d |
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