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On the Radial Stellar Content of Early-Type Galaxies as a Function of Mass and Environment
Using optical-optical and optical-NIR colors, we analyze the radial dependence of age and metallicity inside massive (M* > 10^10.5 MSun), low-redshift (z
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creator | La Barbera, F Ferreras, I de Carvalho, R R Lopes, P A A Pasquali, A I G de la Rosa De Lucia, G |
description | Using optical-optical and optical-NIR colors, we analyze the radial dependence of age and metallicity inside massive (M* > 10^10.5 MSun), low-redshift (z |
doi_str_mv | 10.48550/arxiv.1108.0946 |
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On average, internal color gradients of ETGs are mainly driven by metallicity, consistent with previous studies. However, we find that group galaxies feature positive age gradients, Nabla_t, i.e. a younger stellar population in the galaxy center, and steeper metallicity gradients, compared to the field sample, whose Nabla_t ranges from negative in lower mass galaxies, to positive gradients at higher mass. These dependencies yield new constraints to models of galaxy formation and evolution. 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subjects | Astronomical models Constraint modelling Dependence Deposition Galactic evolution Galaxies Metallicity Red shift Star & galaxy formation Stars & galaxies Stellar age |
title | On the Radial Stellar Content of Early-Type Galaxies as a Function of Mass and Environment |
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