8 papers
New response functions for absorption-line indices from high-resolution spectra
R. Tantalo, C. Chiosi, L. Piovan
Basing on the huge library of 1-A resolution spectra calculated by Munari et al. over a large range of logT, log g, [Fe/H] and both for solar and a-enhanced abundance ratios [a/Fe]…
Mass-to-Light ratio, Initial Mass Function and chemical evolution in disc galaxies
L. Portinari, J. Sommer-Larsen, R. Tantalo
Cosmological simulations of disc galaxy formation, when compared to the observed Tully-Fisher relation, suggest a low Mass-to-Light (M/L) ratio for the stellar component in spirals…
Indices for SSPs with enhanced mix of alpha-elements
Rosaria Tantalo
In this poster line strength indices for new Single Stellar Populations (SSP) based on the recent stellar models with chemical compositions enhanced in the alpha-elements (Salasnic…
To what Extent are Mg2 and <Fe> indicators of Mg and Fe Abundances?
R. Tantalo, A. Bressan, C. Chiosi
The gradients in line strength indices such as Mg2 and <Fe> (Carollo & Danziger 1994a,b; Carollo et al. 1993), and their increase toward massive system (Worthey et al. 1992, Faber…
Ages and Metallicities in Elliptical Galaxies from the H_beta, <Fe>, and Mg2 Diagnostics
R. Tantalo, C. Chiosi, A. Bressan
Systematic variations in the line strength indices H_beta, Mg2, and <Fe> are observed across elliptical galaxies and from one object to another. Furthermore arguments are given for…
Spectro-Photometric Evolution of Elliptical Galaxies. III. Infall models with gradients in mass and star formation
R. Tantalo, C. Chiosi, A. Bressan +2
In this study we present a simple model of elliptical galaxies aimed at interpreting the gradients in colours and narrow band indices observed across these systems. Salient feature…