The role of the Galactic bar in the chemical evolution of the Milky Way

Abstract

In the absence of an interaction, central bars might be the most effective mechanism for radial motions of gas in barred spiral galaxies, which represent two-thirds of disc galaxies. The dynamical effects induced by bars in the first few kpc of discs might play an important role in the disc profiles in this region. In this work, a chemical evolution model with radial gas flows is proposed in order to mimic the effects of the Milky Way bar in the bulge and inner disc. The model is an update of a chemical evolution model with the inclusion of radial gas flows in the disc and bulge. The exchange of gas between the cylindrical concentric regions that form the Galaxy is modelled considering the flows of gas from and to the adjacent cylindrical regions. The most recent data for the bulge metallicity distribution are reproduced by means of a single and longer bulge collapse time-scale (2 Gyr) than other chemical evolution models predict. The model is able to reproduce the peak in the present star formation rate at 4 kpc and the formation of the molecular gas ring. The model with a bar predicts a flattening of the oxygen radial gradient of the disc. Additionally, models with radial gas flows predict a higher star formation rate during the formation of the bulge. This is in agreement with the most recent observations of the star formation rate at the centre of massive barred spiral galaxies.

16 pages, 14 figures, accepted for MNRAS, update to match final published version

References in corpus (70)

• The chemical composition of the Sun
• Star Formation in the Milky Way and Nearby Galaxies
• The Milky Way in Molecular Clouds: A New Complete CO Survey
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• The Chemical Evolution of the Galaxy: the two-infall model
• Chemical evolution with radial mixing
• Updated stellar yields from Asymptotic Giant Branch models
• Abundance Gradients and the Formation of the Milky Way
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. V. Evidence for a wide age distribution and a complex MDF
• The Evolution of Isotope Ratios in the Milky Way Galaxy
• The Metal Content of Bulge Field Stars from FLAMES-GIRAFFE Spectra. I. Stellar parameters and Iron Abundances
• The Distribution Of Heavy Elements In Spiral And Elliptical Galaxies
• Unified Rotation Curve of the Galaxy -- Decomposition into de Vaucouleurs Bulge, Disk, Dark Halo, and the 9-kpc Rotation Dip --
• Bulge n and B/T in High Mass Galaxies: Constraints on the Origin of Bulges in Hierarchical Models
• Spiral arms, bar shape and bulge microlensing in the Milky Way
• Gas Dynamics and Large-Scale Morphology of the Milky Way Galaxy
• The metallicity distribution of bulge clump giants in Baade's Window
• Modelling the Galactic Bar Using Red Clump Giants
• Three-Dimensional Distribution of the ISM in the Milky Way Galaxy: I. The HI Disk
• The Distribution of the Elements in the Galactic Disk III. A Reconsideration of Cepheids from l = 30 to 250 Degrees
• Chemical similarities between Galactic bulge and local thick disk red giants: O, Na, Mg, Al, Si, Ca and Ti
• Evolution of Galactic Discs: Multiple Patterns, Radial Migration and Disc Outskirts
• HII Region Metallicity Distribution in the Milky Way Disk
• The impact of gas inflows on star formation rates and metallicities in barred galaxies
• Using Cepheids to determine the galactic abundance gradient I. The solar neighbourhood
• The structure of the Galactic bar
• Modelling the Galactic bar using OGLE-II Red Clump Giant Stars
• Insights on the Milky Way bulge formation from the correlations between kinematics and metallicity
• Signatures of radial migration in barred galaxies: Azimuthal variations in the metallicity distribution of old stars
• PopStar I: Evolutionary synthesis models description
• Carbon and Oxygen Galactic Gradients: Observational Values from HII Region Recombination Lines
• Sulfur, Chlorine, and Argon Abundances in Planetary Nebulae. IV: Synthesis and the Sulfur Anomaly
• Using Cepheids to determine the galactic abundance gradient II. Towards the galactic center
• The Galactic structure and chemical evolution traced by the population of planetary nebulae
• A grid of chemical evolution models as a tool to interpret spiral and irregular galaxies data
• The Formation of a Disk Galaxy within a Growing Dark Halo
• Tracing the long bar with red-clump giants
• Abundances of Galactic Anticenter Planetary Nebulae and the Oxygen Abundance Gradient in the Galactic Disk
• Luminous and Dark Matter in the Milky Way
• Formation & evolution of the Galactic bulge: constraints from stellar abundances
• Effects of radial flows on the chemical evolution of the Milky Way disk
• Chemical abundances for 11 bulge stars from high-resolution, near-IR spectra
• The Outer Disks of Early-Type Galaxies. II. Surface-Brightness Profiles of Unbarred Galaxies and Trends with Hubble Type
• Bars rejuvenating bulges? Evidence from stellar population analysis
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. II. Ages, metallicities, detailed elemental abundances, and connections to the Galactic thick disc
• Detailed abundances for M giants in two inner bulge fields from Infrared Spectroscopy
• The inner Galactic bar traced by the VVV survey
• Ionized gas kinematics and massive star formation in NGC 1530
• An Upper Limit to the Age of the Galactic Bar
• Abundance gradients in spiral disks: is the gradient inversion at high redshift real?
• Chemical abundances of planetary nebulae towards the direction of the galactic anticenter
• A two-phase scenario for bulge assembly in LCDM cosmologies
• Chemical evolution of the Galactic bulge: different stellar populations and possible gradients
• Low and intermediate mass star yields: The evolution of carbon abundances
• A New Model for the Milky Way Bar
• Alpha Element Abundances in a Large Sample of Galactic Planetary Nebulae
• Radial Flows and Angular Momentum Conservation in Galactic Chemical Evolution
• New abundances of planetary nebulae in the Galactic Bulge
• Chemical Abundances and Dust in Planetary Nebulae in the Galactic Bulge
• Two-Component Galactic Bulge Probed with Renewed Galactic Chemical Evolution Model
• Massive Clusters in the Inner Regions of NGC 1365: Cluster Formation and Gas Dynamics in Galactic Bars
• Formation of Nuclear Spirals in Barred Galaxies
• Galactic astroarchaeology: reconstructing the bulge history by means of the newest data
• The Molecular Gas Density in Galaxy Centers and How It Connects to Bulges
• Bulges
• Low and intermediate mass star yields.II: The evolution of nitrogen abundances
• Modeling the radial abundance distribution of the transition galaxy ngc 1313
• Time variation of the O/H radial gradient in the galactic disk based on planetary nebulae
• Planetary nebulae in the inner Milky Way: new abundances

Cited by in corpus (34)

• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• Chemodynamical evolution of the Milky Way disk II: Variations with Galactic radius and height above the disk plane
• Chemodynamical history of the Galactic Bulge
• Shape of the oxygen abundance profiles in CALIFA face-on spiral galaxies
• The shape of oxygen abundance profiles explored with MUSE: evidence for widespread deviations from single gradients
• Efficiency of gas cooling and accretion at the disc-corona interface
• The MUSE Atlas of Disks (MAD): Resolving Star Formation Rates and Gas Metallicities on < 100pc Scales
• Mass inflow rate into the Central Molecular Zone: observational determination and evidence of episodic accretion
• Chemical evolution of the Milky Way: constraints on the formation of the thick and thin discs
• Evolution of the Milky Way with radial motions of stars and gas II. The evolution of abundance profiles from H to Ni
• Accretion, radial flows and abundance gradients in spiral galaxies
• Abundance gradients along the Galactic disc from chemical evolution models
• The effect of stellar migration on Galactic chemical evolution: a heuristic approach
• Oxygen, α-element and iron abundance distributions in the inner part of the Galactic thin disc
• On the Deuterium-to-Hydrogen Ratio of the Interstellar Medium
• Galaxy gas flows inferred from a detailed, spatially resolved metal budget
• The time evolution of the Milky Way's oxygen abundance gradient
• Oxygen, sulfur, and iron radial abundance gradients of classical Cepheids across the Galactic thin disk
• Bar effect on gas-phase abundance gradients. II. Luminosity-dependent flattening
• The Gas-phase Metallicity Profiles of Star-forming Galaxies in the Modified Accretion Disk Framework
• Oxygen and zinc abundances in 417 Galactic bulge red giants
• Are ancient dwarf satellites the building blocks of the Galactic halo?
• SDSS IV MaNGA: Bar pattern speed in Milky Way Analogue galaxies
• Mapping radial abundance gradients with Gaia-ESO open clusters: Evidence of recent gas accretion in the Milky Way disk
• 2D-Galactic chemical evolution: the role of the spiral density wave
• The last 5 Gyr of Galactic chemical evolution based on H II region abundances derived from a temperature independent method
• M101: Spectral Observations of HII Regions and Their Physical Properties
• Metallicities in the Outer Regions of Spiral Galaxies
• Uniform Silicon Isotope Ratios Across the Milky Way Galaxy
• The population of planetary nebulae near the Galactic centre: chemical abundances
• The parametrization of gas flows in discs in the Auriga simulations
• The multi-zone chemical evolution of the Galactic bulge: predicting abundances for different radial zones
• Modelling the chemical evolution of the Milky Way
• The impact of bars on the properties of HII regions in the TIMER survey