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Arxiv: Deciphering Gas Dynamics and Star Formation in a z=1.1 Main Sequence Spiral Galaxy with ALMA and JWST Published: 10/28/2024 5:10:28 AM Updated: 10/28/2024 5:10:28 AM

Paper abstract: We present a joint analysis of high-resolution CO(2-1) and Paschen-\alphaemission lines to trace gas dynamics and spatially resolved star formation inASPECS-LP.3mm.06, a z=1.1 main sequence galaxy. Utilizing data from the ALMAand JWST NIRCam Wide Field Slitless Spectroscopy (WFSS), we explore bothionized gas and molecular gas within this galaxy. With a substantial moleculargas fraction (f_\mathrm{mol} = 0.44 \pm 0.02), ASPECS-LP.3mm.06 remains onthe star-forming main sequence and adheres to the Kennicutt-Schmidt (KS)relation, indicating typical gas-to-star conversion efficiency. Our analysisreveals extended structures across multiple wavelengths, suggesting regulatedstar formation within a stable disk. The spatially resolved star formationefficiency (SFE) and kinematic analysis indicate that ASPECS-LP.3mm.06 featuresa smooth mass assembly process across bulge and disk. Additionally, the galaxyexhibits modest dust extinction (A_\mathrm{V} = 0.8), potentially linked toself-regulation during bulge formation. These findings positionASPECS-LP.3mm.06 as a prototypical galaxy, offering valuable insights into themechanisms governing normal disk galaxy growth at z~1.