A cosmological study of the star formation history in the solar neighbourhood

Abstract

We use a cosmological galactic evolutionary approach to model the Milky Way. A detailed treatment of the mass aggregation and dynamical history of the growing dark halo is included, together with a self consistent physical treatment for the star formation processes within the growing galactic disc. This allows us to calculate the temporal evolution of star and gas surface densities at all galactic radii, in particular, the star formation history (SFH) at the solar radius. A large range of cosmological mass aggregation histories (MAHs) is capable of producing a galaxy with the present day properties of the Milky Way. The resulting SFHs for the solar neighbourhood bracket the available observational data for this feature, the most probable MAH yielding the optimal comparison with these observations. We also find that the rotation curve for our Galaxy implies the presence of a constant density core in its dark matter halo.

11 pages, 5 encapsulated figures. Accepted for publication in MNRAS. Minor changes, references updated

Cited by in corpus (21)

• LCDM-based models for the Milky Way and M31 I: Dynamical Models
• Kinematics and history of the solar neighbourhood revisited
• Secular bar formation in galaxies with significant amount of dark matter
• A simple model for the evolution of disc galaxies: The Milky Way
• The phase-space structure of cold dark-matter halos: Insights into the Galactic halo
• Investigating the Origins of Dark Matter Halo Density Profiles
• The Spectrum of the Diffuse Galactic Light I: The Milky Way in Scattered Light
• The Abundance and Radial Distribution of Satellite Galaxies
• Milky Way potentials in CDM and MOND. Is the Large Magellanic Cloud on a bound orbit?
• Chemical evolution of local galaxies in a hierarchical model
• Empirical distributions of galactic $\lambda$ spin parameters from the SDSS
• The Star Formation Histories of the Bulge and Disk of M31 from Gemini North+NIRI/Altair and HST/NICMOS
• Pulsar Binary Birthrates with Spin-Opening Angle Correlations
• A Dimensional study of Disk Galaxies
• Galactic archaeology: IMF and depletion in the "thin disk"
• Low-mass galaxy formation in cosmological AMR simulations: the effects of varying the sub-grid physics parameters
• Environment and mass dependencies of galactic $\lambda$ spin parameter: cosmological simulations and observed galaxies compared
• Secular evolution of galactic discs: constraints on phase-space density
• On the environment of Low Surface Brightness galaxies at different scales
• Dynamical consequences of CDM merger trees
• Star formation history in the solar neighborhood: the link between stars and cosmology