TY - JOUR
T1 - JWST's PEARLS
T2 - TN J1338-1942 - I. Extreme jet-triggered star formation in a z = 4.11 luminous radio galaxy
AU - Duncan, Kenneth J.
AU - Windhorst, Rogier A.
AU - Koekemoer, Anton M.
AU - Röttgering, Huub J.A.
AU - Cohen, Seth H.
AU - Jansen, Rolf A.
AU - Summers, Jake
AU - Tompkins, Scott
AU - Hutchison, Taylor A.
AU - Conselice, Christopher J.
AU - Driver, Simon P.
AU - Yan, Haojing
AU - Adams, Nathan J.
AU - Cheng, Cheng
AU - Coe, Dan
AU - Diego, Jose M.
AU - Dole, Hervé
AU - Frye, Brenda
AU - Gim, Hansung B.
AU - Grogin, Norman A.
AU - Holwerda, Benne W.
AU - Lim, Jeremy
AU - Marshall, Madeline A.
AU - Nonino, Mario
AU - Pirzkal, Nor
AU - Robotham, Aaron
AU - Ryan, Russell E.
AU - Willmer, Christopher N.A.
N1 - Publisher Copyright:
© 2023 The Author(s)
PY - 2023/7/1
Y1 - 2023/7/1
N2 - We present the first JWST observations of the z = 4.11 luminous radio galaxy TN J1338-1942, obtained as part of the 'Prime Extragalactic Areas for Reionization and Lensing Science' ('PEARLS') project. Our NIRCam observations, designed to probe the key rest-frame optical continuum and emission line features at this redshift, enable resolved spectral energy distribution modelling that incorporates both a range of stellar population assumptions and radiative shock models. With an estimated stellar mass of log10(M/M☉) ∼ 10.9, TN J1338-1942 is confirmed to be one of the most massive galaxies known at this epoch. Our observations also reveal extremely high equivalent-width nebular emission coincident with the luminous AGN jets that is best fit by radiative shocks surrounded by extensive recent star formation. We estimate the total star-formation rate (SFR) could be as high as ∼ 1600 M☉ yr−1, with the SFR that we attribute to the jet induced burst conservatively ≳ 500 M☉ yr−1. The mass-weighted age of the star-formation, tmass < 4 Myr, is consistent with the likely age of the jets responsible for the triggered activity and significantly younger than that measured in the core of the host galaxy. The extreme scale of the potential jet-triggered star-formation activity indicates the potential importance of positive AGN feedback in the earliest stages of massive galaxy formation, with our observations also illustrating the extraordinary prospects for detailed studies of high-redshift galaxies with JWST.
AB - We present the first JWST observations of the z = 4.11 luminous radio galaxy TN J1338-1942, obtained as part of the 'Prime Extragalactic Areas for Reionization and Lensing Science' ('PEARLS') project. Our NIRCam observations, designed to probe the key rest-frame optical continuum and emission line features at this redshift, enable resolved spectral energy distribution modelling that incorporates both a range of stellar population assumptions and radiative shock models. With an estimated stellar mass of log10(M/M☉) ∼ 10.9, TN J1338-1942 is confirmed to be one of the most massive galaxies known at this epoch. Our observations also reveal extremely high equivalent-width nebular emission coincident with the luminous AGN jets that is best fit by radiative shocks surrounded by extensive recent star formation. We estimate the total star-formation rate (SFR) could be as high as ∼ 1600 M☉ yr−1, with the SFR that we attribute to the jet induced burst conservatively ≳ 500 M☉ yr−1. The mass-weighted age of the star-formation, tmass < 4 Myr, is consistent with the likely age of the jets responsible for the triggered activity and significantly younger than that measured in the core of the host galaxy. The extreme scale of the potential jet-triggered star-formation activity indicates the potential importance of positive AGN feedback in the earliest stages of massive galaxy formation, with our observations also illustrating the extraordinary prospects for detailed studies of high-redshift galaxies with JWST.
KW - galaxies: high-redshift
KW - galaxies: individual: (TN J1338-1942)
KW - galaxies: jets
KW - radio continuum: galaxies
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U2 - 10.1093/mnras/stad1267
DO - 10.1093/mnras/stad1267
M3 - Article
AN - SCOPUS:85159862173
SN - 0035-8711
VL - 522
SP - 4548
EP - 4564
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -