New Evolutionary Synthesis code. An application to the irregular galaxy NGC 1560

Abstract

We have developed a new evolutionary synthesis code, which incorporates the output from chemical evolution models. We compare results of this new code with other published codes, and we apply it to the irregular galaxy NGC 1560 using sophisticated chemical evolution models. The code makes important contributions in two areas: a) the building of synthetic populations with time-dependent star formation rates and stellar populations of different metallicities; b) the extension of the set of stellar tracks from the Geneva group by adding the AGB phases for $m_i/M_{\odot }\ge 0.8$ as well as the very low mass stars. Our code predicts spectra, broad band colors, and Lick indices by using a spectra library, which cover a more complete grid of stellar parameters. The application of the code with the chemical models to the galaxy NGC 1560 constrain the star formation age for its stellar population around 10.0 Gy.

10 pages, 15 figures, submited to A&A

References in corpus (5)

• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra
• A standard stellar library for evolutionary synthesis: II. The M dwarf extension
• Grids of stellar models. VIII. From 0.4 to 1.0 Msun at Z=0.020 and Z=0.001, with the MHD equation of state
• Dark Matter and the Chemical Evolution of Irregular Galaxies

Cited by in corpus (9)

• Optimization of Starburst99 for Intermediate-Age and Old Stellar Populations
• Chemically consistent evolution of galaxies: II. Spectrophotometric evolution from zero to high redshift
• Chemical Evolution of Dwarf Irregular and Blue Compact Galaxies
• The evolution of H{\sc ii} galaxies: Testing the bursting scenario through the use of self-consistent models
• Probing the Central Regions of Nearby Compact Elliptical Galaxies
• Near-infrared spectroscopy of stellar populations in nearby spiral galaxies
• Evolution of star forming dwarf galaxies: Characterizing the star formation scenarios
• Chemical and photometric evolution models for disk, irregular and low mass galaxies
• The stellar content of low redshift radio galaxies from near-infrared spectroscopy