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Exploring the Relationship Between Bars, Star Formation Activity, and Host Galaxy Properties from𝐳 ∼ 𝟎to
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Exploring the Relationship Between Bars, Star Formation Activity, and Host Galaxy Properties from𝐳 ∼ 𝟎to

Eden Wise, Shardha Jogee, Yuchen Guo, Steven L Finkelstein, Micaela B Bagley, Marc Huertas-Company, Kartheik G Iyer, Elizabeth J McGrath, Natalia C Villanueva, Tommaso Zana, …
15/06/2026

摘要

Physics - Astrophysics of Galaxies
We present the most comprehensive study to date of the relationship between bars, star formation, and galaxy properties from$z \sim$0 to$z \sim$2. We use a mass-complete sample of 1,171 galaxies from the JWST CEERS survey with$M_\star > 10^{10} M_\odot$and repeat the analysis using COSMOS-Web data. Our results are: 1) At high redshift ( $z \sim$$1-2$ ) barred galaxies tend to have high sSFRs and low Sérsic indices ( $n \leq 2$ ), while at low redshifts barred galaxies emerge with both low sSFR and higher$n$ , suggestive of quiescent galaxies with bulges. 2) The fractional contribution of barred quiescent galaxies to the bar fraction rises steeply from$z \sim$2 to$z \sim$0, while that of barred actively star-forming galaxies falls. 3) The fraction of quiescent galaxies that are barred rises steeply over the last 10 Gyr. 4) Our empirical results show good agreement with the TNG50-1 simulations for bars with$a_{\mathrm{bar}}$$>$1.5 kpc. Our results allow for the possibility that bar-driven secular evolution may lead to quiescence and/or that bars are more likely to persist and grow in gas-poor, quiescent galaxies. The steep rise in the quiescent bar fraction over 10 Gyr may represent an evolutionary sequence whereby gas-rich disks at high redshift first develop short, dynamically young bars and over time, repeated bar-driven gas inflows lead to central starbursts and declining gas fractions that strengthen the bar as the galaxy transitions toward quiescence.

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