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Spectroscopic Ages and Metallicities of Galaxies

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
M. Koleva ,
A.G. Bedregal ,
Ph. Prugniel ,
S. De Rijcke  and
W.W. Zeilinger
M. Koleva
Affiliation:
IAC, La Laguna and Dept. de Astrofísica, Univ. de La Laguna, 38200 Tenerife, Spain Université Lyon 1, Villeurbanne, CRAL, Observatoire de Lyon, CNRS, UMR 5574, France
A.G. Bedregal
Affiliation:
Dept. de Astrofísica y CC. de la Atmósfera, Univ. Complutense de Madrid, 28040 Madrid, Spain
Ph. Prugniel
Affiliation:
Université Lyon 1, Villeurbanne, CRAL, Observatoire de Lyon, CNRS, UMR 5574, France
S. De Rijcke
Affiliation:
Dept. of Physics & Astronomy, Ghent University, Krijgslaan 281, S9, 9000, Belgium
W.W. Zeilinger
Affiliation:
Institut für Astronomie, Universität Wien, Türkenschanzstrasse 17, 1180 Wien, Austria
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Abstract

Dwarf galaxies are generally faint. To derive their age and metallicity distributions, it is critical to optimize the use of any collected photon. Koleva et al., using full spectrum fitting, have found strong population gradients in some dwarf elliptical galaxies. Here, we show that the population profiles derived with this method are consistent and more precise with those obtained with spectrophotometric indices. This allows studying fainter objects in less telescope time.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 85 - 86
Copyright
© EAS, EDP Sciences, 2011

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References

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