MIUSCAT: extended MILES spectral coverage - II. Constraints from optical photometry

In this work, we show a comprehensive comparison of our new stellar population synthesis (SPS) MIUSCAT models with photometric data of globular clusters (GCs) and early-type galaxies.The models compare remarkably well with the colours of Milky Way GCs in the optical range. Likewise, the colours of M...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2012-07, Vol.424 (1), p.172-189
Main Authors: Ricciardelli, E., Vazdekis, A., Cenarro, A. J., Falcón-Barroso, J.
Format: Article
Language:English
Subjects:
Astrophysics
galaxies: elliptical and lenticular, cD
galaxies: star clusters: individual: M31
galaxies: stellar content
globular clusters: general
Stars & galaxies
Online Access:Get full text
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Summary:In this work, we show a comprehensive comparison of our new stellar population synthesis (SPS) MIUSCAT models with photometric data of globular clusters (GCs) and early-type galaxies.The models compare remarkably well with the colours of Milky Way GCs in the optical range. Likewise, the colours of M31 GCs can also be explained by the models by assuming younger ages than their Galactic counterparts. When compared with quiescent galaxies, we reproduce the colour evolution at intermediate redshift. On the other hand, we find that the colour relations of nearby early-type galaxies are still a challenge for present-day SPS models. We investigate a number of possible explanations and establish the importance of α-enhanced models to bring down the discrepancy with observations.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2012.21178.x