The star-formation history of low-mass disk galaxies: a case study of NGC\,300

Abstract

Since NGC300 is a bulge-less, isolated low-mass galaxy and has not experienced radial migration during its evolution history, it can be treated as an ideal laboratory to test simple galactic chemical evolution models. By assuming its disk forms gradually from continuous accretion of primordial gas and including the gas-outflow process, we construct a simple chemical evolution model for NGC300 to build a bridge between its SFH and its observed data, especially the present-day radial profiles and global observed properties (e.g., cold gas mass, star-formation rate and metallicity). By means of comparing the model predictions with the corresponding observations, we adopt the classical ${\chi }^2$ methodology to find out the best combination of free parameters $a$, $b$ and $b_{\mathrm{out}}$. Our results show that, by assuming an inside-out formation scenario and an appropriate outflow rate, our model reproduces well most of the present-day observational values, not only the radial profiles but also the global observational data for the NGC300 disk. Our results suggest that NGC300 may experience a rapid growth of its disk. Through comparing the best-fitting model predicted SFH of NGC300 with that of M33, we find that the mean stellar age of NGC300 is older than that of M33 and there is a lack of primordial gas infall onto the disk of NGC300 recently. Our results also imply that the local environment may paly a key role in the secular evolution of NGC300.

12pages, 13figures, accepted for publication in A&A

References in corpus (18)

• The ACS Nearby Galaxy Survey Treasury
• The Origin of the Galaxy Mass-Metallicity Relation and Implications for Galactic Outflows
• The Universal Relation of Galactic Chemical Evolution: The Origin of the Mass-Metallicity Relation
• Extragalactic chemical abundances: do HII regions and young stars tell the same story? The case of the spiral galaxy NGC 300
• Metallicity gradients in local field star-forming galaxies: Insights on inflows, outflows, and the coevolution of gas, stars and metals
• Specific SFR profiles in nearby spiral galaxies: quantifying the inside-out formation of disks
• The Abundance Properties of Nearby Late-Type Galaxies.I. The Data
• A Model for Star Formation, Gas Flows and Chemical Evolution in Galaxies at High Redshifts
• Associations of Dwarf Galaxies
• The M33 Metallicity Project: Resolving the Abundance Gradient Discrepancies in M33
• Galaxy And Mass Assembly (GAMA): Stellar mass functions by Hubble type
• The ACS Nearby Galaxy Survey Treasury V. Radial Star Formation History of NGC 300
• Evolution of the Milky Way with radial motions of stars and gas II. The evolution of abundance profiles from H to Ni
• The star formation history of galaxies: the role of galaxy mass, morphology and environment
• The effect of differential galactic winds on the chemical evolution of galaxies
• Oxygen abundance distribution in Galactic disc
• The Stellar Populations of M33's Outer Regions II: Deep ACS Imaging
• The Evolution of Interacting Spiral Galaxy NGC 5194

Cited by in corpus (13)

• Fast and inefficient star formation due to short-lived molecular clouds and rapid feedback
• On the duration of the embedded phase of star formation
• How Galactic Environment affects the Dynamical State of Molecular Clouds and their Star Formation Efficiency
• A spectroscopic study of blue supergiant stars in the Sculptor galaxy NGC 55: chemical evolution and distance
• The impact of pre-supernova feedback and its dependence on environment
• Mass-Metallicity and Star Formation Rate in Galaxies: a complex relation tuned to stellar age
• Isolating the young stellar population in the outer disk of NGC 300
• MUSE crowded field 3D spectroscopy in NGC 300 III. Characterizing extremely faint HII regions and diffuse ionized gas
• Breaking the degeneracy between gas inflow and outflows with stellar metallicity: Insights on M101
• The role of environment on the star formation history of disc galaxies
• Monitoring the X-ray Variability of Bright X-ray Sources in M33
• Evolution and star formation history of NGC300 from a chemical evolution model with radial gas inflows
• The ADF and the t${}^2$ formalism in H II regions based on the upper mass limit of the IMF for the MW