TY - JOUR
T1 - PEARLS
T2 - JWST Counterparts of Microjansky Radio Sources in the Time Domain Field
AU - Willner, S. P.
AU - Gim, Hansung B.
AU - del Carmen Polletta, Maria
AU - Cohen, Seth H.
AU - Willmer, Christopher N.A.
AU - Zhao, Xiurui
AU - D’Silva, Jordan C.J.
AU - Jansen, Rolf A.
AU - Koekemoer, Anton M.
AU - Summers, Jake
AU - Windhorst, Rogier A.
AU - Coe, Dan
AU - Conselice, Christopher J.
AU - Driver, Simon P.
AU - Frye, Brenda
AU - Grogin, Norman A.
AU - Marshall, Madeline A.
AU - Nonino, Mario
AU - Ortiz, Rafael
AU - Pirzkal, Nor
AU - Robotham, Aaron
AU - Rutkowski, Michael J.
AU - Ryan, Russell E.
AU - Tompkins, Scott
AU - Yan, Haojing
AU - Hammel, Heidi B.
AU - Milam, Stefanie N.
AU - Adams, Nathan J.
AU - Beacom, John F.
AU - Bhatawdekar, Rachana
AU - Cheng, Cheng
AU - Civano, F.
AU - Cotton, W.
AU - Hyun, Minhee
AU - Kikuta, Satoshi
AU - Nyland, K. E.
AU - Peters, W. M.
AU - Petric, Andreea
AU - Röttgering, Huub J.A.
AU - Shimwell, T.
AU - Yun, Min S.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/12/1
Y1 - 2023/12/1
N2 - The Time Domain Field (TDF) near the North Ecliptic Pole in JWST’s continuous-viewing zone will become a premier “blank field” for extragalactic science. JWST/NIRCam data in a 16 arcmin2 portion of the TDF identify 4.4 μm counterparts for 62 of 63 3 GHz sources with S(3 GHz) > 5 μJy. The one unidentified radio source may be a lobe of a nearby Seyfert galaxy, or it may be an infrared-faint radio source. The bulk properties of the radio-host galaxies are consistent with those found by previous work: redshifts range from 0.14-4.4 with a median redshift of 1.33. The radio emission arises primarily from star formation in ∼2/3 of the sample and from an active galactic nucleus (AGN) in ∼1/3, but just over half the sample shows evidence for an AGN either in the spectral energy distribution or by radio excess. All but three counterparts are brighter than magnitude 23 AB at 4.4 μm, and the exquisite resolution of JWST identifies correct counterparts for sources for which observations with lower angular resolution would misidentify a nearby bright source as the counterpart when the correct one is faint and red. Up to 11% of counterparts might have been unidentified or misidentified absent NIRCam observations.
AB - The Time Domain Field (TDF) near the North Ecliptic Pole in JWST’s continuous-viewing zone will become a premier “blank field” for extragalactic science. JWST/NIRCam data in a 16 arcmin2 portion of the TDF identify 4.4 μm counterparts for 62 of 63 3 GHz sources with S(3 GHz) > 5 μJy. The one unidentified radio source may be a lobe of a nearby Seyfert galaxy, or it may be an infrared-faint radio source. The bulk properties of the radio-host galaxies are consistent with those found by previous work: redshifts range from 0.14-4.4 with a median redshift of 1.33. The radio emission arises primarily from star formation in ∼2/3 of the sample and from an active galactic nucleus (AGN) in ∼1/3, but just over half the sample shows evidence for an AGN either in the spectral energy distribution or by radio excess. All but three counterparts are brighter than magnitude 23 AB at 4.4 μm, and the exquisite resolution of JWST identifies correct counterparts for sources for which observations with lower angular resolution would misidentify a nearby bright source as the counterpart when the correct one is faint and red. Up to 11% of counterparts might have been unidentified or misidentified absent NIRCam observations.
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U2 - 10.3847/1538-4357/acfdfb
DO - 10.3847/1538-4357/acfdfb
M3 - Article
AN - SCOPUS:85179470852
SN - 0004-637X
VL - 958
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 176
ER -