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A 3D view of the Hydra I cluster core- II. Stellar populations

Published online by Cambridge University Press:  09 February 2015

Carlos Eduardo Barbosa ,
Magda Arnaboldi ,
Michael Hilker ,
Lodovico Coccato ,
Tom Richtler  and
Cláudia Mendes de Oliveira
Carlos Eduardo Barbosa
Affiliation:
European Southern Observatory, Garching, Germany IAG-USP, São Paulo, SP, Brazil
Magda Arnaboldi
Affiliation:
European Southern Observatory, Garching, Germany
Michael Hilker
Affiliation:
European Southern Observatory, Garching, Germany
Lodovico Coccato
Affiliation:
European Southern Observatory, Garching, Germany
Tom Richtler
Affiliation:
Universidad de Concepción, Concepción, Chile
Cláudia Mendes de Oliveira
Affiliation:
IAG-USP, São Paulo, SP, Brazil
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Abstract

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Several observations of the central region of the Hydra I galaxy cluster point to a multi-epoch assembly history. Using our novel FORS2/VLT spectroscopic data set, we were able to map the luminosity-weighted age, [Fe/H] and [α/Fe] distributions for the stellar populations around the cD galaxy NGC 3311. Our results indicate that the stellar populations follow the trends of the photometric substructures, with distinct properties that may aid to constrain the evolutionary scenarios for the formation of the cluster core.

Keywords

galaxies: elliptical and lenticularcD - galaxies: clusters: individual (Hydra I) - galaxies: stellar content
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 223 - 224
Copyright
Copyright © International Astronomical Union 2015 

References

Arnaboldi, M., Ventimiglia, G., Iodice, E., Gerhard, O., & Coccato, L., 2012, A&A, 545, A37Google Scholar
Coccato, L., Gerhard, O., Arnaboldi, M., & Ventimiglia, G., 2011, A&A, 533, A138Google Scholar
Thomas, D., Maraston, C., & Johansson, J., 2011, MNRAS, 412, 2183CrossRefGoogle Scholar