Large gas inflow driven by a matured galactic bar in the early Universe

Abstract

Bar structures are present in about half of local disk galaxies and play pivotal roles in secular galaxy evolution. Bars impose a non-axisymmetric perturbation to the rotating disk and transport gas inward to feed central starburst and, possibly, the activity of the nuclear supermassive black hole. They are believed to be long-lived structures and are now identified at redshift $z>2$. Yet, little is known about the onset and effect of bars in the early cosmic epoch because spectroscopy of distant bars at sufficient resolution is prohibitively expensive. Here, we report a kinematic study of a galactic bar at redshift 2.467, 2.6 billion years after the Big Bang. We observe the carbon monoxide and atomic carbon emission lines of the dusty star-forming galaxy J0107a and find the bar of J0107a has gas distribution and motion in a pattern identical to local bars. At the same time, the bar drives large-scale non-circular motions that dominate over disk rotation, funneling molecular gas into its center at a rate of $\approx 600$ solar masses per year. Our results show that bar-driven dynamical processes and secular evolution were already at play 11.1 billion years ago, powering active star formation amid the gas-rich and far-infrared luminous growth phase in a massive disk galaxy.

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References in corpus (26)

• Cold streams in early massive hot haloes as the main mode of galaxy formation
• The Circumgalactic Medium
• The SAURON project - VII. Integral-field absorption and emission-line kinematics of 24 spiral galaxy bulges
• Submillimetre galaxies in a hierarchical universe: number counts, redshift distribution, and implications for the IMF
• PHANGS-ALMA Data Processing and Pipeline
• Extreme Value Statistics of the Halo and Stellar Mass Distributions at High Redshift: are JWST Results in Tension with ΛCDM?
• First Look at z > 1 Bars in the Rest-Frame Near-Infrared with JWST Early CEERS Imaging
• Dust, CO and [CI]: Cross-calibration of molecular gas mass tracers in metal-rich galaxies across cosmic time
• A Milky Way-like barred spiral galaxy at a redshift of 3
• A numerical study of interactions and stellar bars
• CO Multi-line Imaging of Nearby Galaxies (COMING) IV. Overview of the Project
• The rapid onset of stellar bars in the baryon-dominated centers of disk galaxies
• Ubiquitous Molecular Outflows in z > 4 Massive, Dusty Galaxies I. Sample Overview and Clumpy Structure in Molecular Outflows on 500pc Scales
• Evidence for Cold-stream to Hot-accretion Transition as Traced by Lyα Emission from Groups and Clusters at 2 < z < 3.3
• The Mass Dependence of Star Formation Histories in Barred Spiral Galaxies
• The Structure of Massive Star-Forming Galaxies from JWST and ALMA: Dusty, High Redshift Disk Galaxies
• Applying the Tremaine-Weinberg Method to Nearby Galaxies: Stellar Mass-Based Pattern Speeds, and Comparisons with ISM Kinematics
• Bar-like galaxies in IllustrisTNG
• J0107a: A Barred Spiral Dusty Star-forming Galaxy at $z=2.467$
• PHANGS-JWST First Results: Stellar Feedback-Driven Excitation and Dissociation of Molecular Gas in the Starburst Ring of NGC 1365?
• Exploring stellar and ionized gas non--circular motions in barred galaxies with MUSE
• PHANGS-MeerKAT and MHONGOOSE HI observations of nearby spiral galaxies: physical drivers of the molecular gas fraction, $R_{\mathrm{mol}}$
• Simulating nearby disc galaxies on the main star formation sequence I. Bar formation and the building of the central gas reservoir
• Galaxy formation physics behind bar formation: A view from cosmological hydrodynamical simulations
• On the Tremaine-Weinberg method: how much can we trust gas tracers to measure pattern speeds?
• The evolution of the barred galaxy population in the TNG50 simulation

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