The first quantitative identification and characterisation of stellar bars at z > 1. based on rest-frame NIR F444W images of high resolution (∼1.3 kpc at z ∼ 1–3), including two highest redshift bars at z ∼ 2.136 and 2.312. Not full census yet.
The barred host galaxies have stellar masses ∼ 1 × 10^10 to 2 × 10^11 M, star formation rates of ∼ 21–295 M yr−1, and several have potential nearby companions which might play a role in the formation of these substructures.
The study demonstrates that bars form early in massive dynamically cold disks. projected semi-major axes of ∼ 2.9–4.3 kpc and moderate to high projected maximum ellipticities of ∼ 0.41–0.53 in the rest-frame NIR.
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Guo+2022 - First Look at z > 1 Bars in the Rest-Frame Near-Infrared with JWST Early CEERS Imaging
The first quantitative identification and characterisation of stellar bars at z > 1. based on rest-frame NIR F444W images of high resolution (∼1.3 kpc at z ∼ 1–3), including two highest redshift bars at z ∼ 2.136 and 2.312. Not full census yet.
The barred host galaxies have stellar masses ∼ 1 × 10^10 to 2 × 10^11 M, star formation rates of ∼ 21–295 M yr−1, and several have potential nearby companions which might play a role in the formation of these substructures.
The study demonstrates that bars form early in massive dynamically cold disks. projected semi-major axes of ∼ 2.9–4.3 kpc and moderate to high projected maximum ellipticities of ∼ 0.41–0.53 in the rest-frame NIR.
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