TY - JOUR
T1 - Uncovering a Massive z∼7.7 Galaxy Hosting a Heavily Obscured Radio-loud Active Galactic Nucleus Candidate in COSMOS-Web
AU - Lambrides, Erini
AU - Chiaberge, Marco
AU - Long, Arianna S.
AU - Liu, Daizhong
AU - Akins, Hollis B.
AU - Ptak, Andrew F.
AU - Andika, Irham Taufik
AU - Capetti, Alessandro
AU - Casey, Caitlin M.
AU - Champagne, Jaclyn B.
AU - Chworowsky, Katherine
AU - Clarke, Tracy E.
AU - Cooper, Olivia R.
AU - Ding, Xuheng
AU - Dong, Dillon Z.
AU - Faisst, Andreas L.
AU - Forman, Jordan Y.
AU - Franco, Maximilien
AU - Gillman, Steven
AU - Gozaliasl, Ghassem
AU - Hall, Kirsten R.
AU - Harish, Santosh
AU - Hayward, Christopher C.
AU - Hirschmann, Michaela
AU - Hutchison, Taylor A.
AU - Jahnke, Knud
AU - Jin, Shuowen
AU - Kartaltepe, Jeyhan S.
AU - Kleiner, Emma T.
AU - Koekemoer, Anton M.
AU - Kokorev, Vasily
AU - Manning, Sinclaire M.
AU - Martin, Crystal L.
AU - McKinney, Jed
AU - Norman, Colin
AU - Nyland, Kristina
AU - Onoue, Masafusa
AU - Robertson, Brant E.
AU - Shuntov, Marko
AU - Silverman, John D.
AU - Stiavelli, Massimo
AU - Trakhtenbrot, Benny
AU - Vardoulaki, Eleni
AU - Zavala, Jorge A.
AU - Allen, Natalie
AU - Ilbert, Olivier
AU - McCracken, Henry Joy
AU - Paquereau, Louise
AU - Rhodes, Jason
AU - Toft, Sune
N1 - Publisher Copyright:
© 2024 Institute of Physics Publishing. All rights reserved.
PY - 2024
Y1 - 2024
N2 - In this Letter, we report the discovery of the highest redshift, heavily obscured, radio-loud (RL) active galactic nucleus (AGN) candidate selected using JWST NIRCam/MIRI, mid-IR, submillimeter, and radio imaging in the COSMOS-Web field. Using multifrequency radio observations and mid-IR photometry, we identify a powerful, RL, growing supermassive black hole with significant spectral steepening of the radio spectral energy distribution (f1.28 GHz ∼ 2 mJy, q24 μm = −1.1, α1.28−3 GHz = − 1.2, Δα = − 0.4). In conjunction with ALMA, deep ground-based observations, ancillary space-based data, and the unprecedented resolution and sensitivity of JWST, we find no evidence of AGN contribution to the UV/optical/near-infrared (NIR) data and thus infer heavy amounts of obscuration (NH > 1023 cm−2). Using the wealth of deep UV to submillimeter photometric data, we report a singular solution photo-z of zphot = 7.7-+0.30.4 and estimate an extremely massive host galaxy (log M* = 11.92 0.5M) hosting a powerful, growing supermassive black hole (LBol = 4−12x × 1046 erg s−1). This source represents the farthest known obscured RL AGN candidate, and its level of obscuration aligns with the most representative but observationally scarce population of AGN at these epochs.
AB - In this Letter, we report the discovery of the highest redshift, heavily obscured, radio-loud (RL) active galactic nucleus (AGN) candidate selected using JWST NIRCam/MIRI, mid-IR, submillimeter, and radio imaging in the COSMOS-Web field. Using multifrequency radio observations and mid-IR photometry, we identify a powerful, RL, growing supermassive black hole with significant spectral steepening of the radio spectral energy distribution (f1.28 GHz ∼ 2 mJy, q24 μm = −1.1, α1.28−3 GHz = − 1.2, Δα = − 0.4). In conjunction with ALMA, deep ground-based observations, ancillary space-based data, and the unprecedented resolution and sensitivity of JWST, we find no evidence of AGN contribution to the UV/optical/near-infrared (NIR) data and thus infer heavy amounts of obscuration (NH > 1023 cm−2). Using the wealth of deep UV to submillimeter photometric data, we report a singular solution photo-z of zphot = 7.7-+0.30.4 and estimate an extremely massive host galaxy (log M* = 11.92 0.5M) hosting a powerful, growing supermassive black hole (LBol = 4−12x × 1046 erg s−1). This source represents the farthest known obscured RL AGN candidate, and its level of obscuration aligns with the most representative but observationally scarce population of AGN at these epochs.
KW - Active galactic nuclei (16)
KW - High-redshift galaxies (734)
KW - Radio loud quasars (1349)
KW - Reionization (1383)
KW - Supermassive black holes (1663)
KW - Unified Astronomy Thesaurus concepts: Quasars (1319)
U2 - 10.3847/2041-8213/ad11ee
DO - 10.3847/2041-8213/ad11ee
M3 - Journal article
AN - SCOPUS:85184272274
SN - 2041-8205
VL - 961
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L25
ER -