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

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

2002-01-22

arxiv.org/abs/astro-ph/0201372v1

Astron.Astrophys. 400 (2003) 31-40

Astronomy and Astrophysics

Astrophysics

10 pages, 15 figures, submited to A&A

Scientific paper

10.1051/0004-6361:20021768

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 $m_i/M_\odot \geq 0.8$ 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.

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