The evolution of the content of heavy elements in galaxies, the relative chemical
abundances, their spatial distribution, and how these scale with various galactic properties …

▪ Abstract In this article we first review the main physical effects to be considered in the
building of evolutionary models of rotating stars on the Upper Main-Sequence (MS). The …

Simple relations for deriving the oxygen abundance in H ii regions with intensities of the
three strong emission lines R 2, R 3, and N 2 (R calibration) or S 2, R 3, and N 2 (S …

We have used a combination of stellar population synthesis and photoionization models to
develop a set of ionization parameter and abundance diagnostics based only on the use of …

AAT/IPCS spectra have been obtained from six H ii regions at differing radial distances from
the centre of the Sed galaxy NGC 300 (Sculptor Group) and from three H ii regions in the …

Using the output from a grid of 60 Type II supernova models (Woosley\& Weaver 1994) of
varying mass (11$\ltaprx $ M/M\sun $\ltaprx $40) and metallicity (0, 10$^{-4} $, 0.01, 0.1, and …

We present intermediate-resolution optical spectrophotometry of 65 galaxies obtained in
support of the Spitzer Infrared Nearby Galaxies Survey (SINGS). For each galaxy we obtain …

Context. Galactic chemical evolution models are useful tools for interpreting the large body
of high-quality observational data on the chemical composition of stars and gas in galaxies …

We separately assess elemental abundances in active galactic nuclei's (AGNs) broad and
narrow emission line regions (BLR and NLR), based on a critical assessment of published …

Radio and optical spectroscopy have been combined to measure chemical abundances in a
large and representative sample of galactic H ii regions covering a wide range in …