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An Accurate Timescale for Star Formation and Chemical Enrichment of theSculptor dSph

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
T.J.L. de Boer ,
E. Tolstoy ,
A. Saha  and
K. Olsen
T.J.L. de Boer*
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen
E. Tolstoy
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen
A. Saha
Affiliation:
National Optical Astronomy Observatory, PO box 26732, Tucson, AZ 85726, USA
K. Olsen
Affiliation:
National Optical Astronomy Observatory, PO box 26732, Tucson, AZ 85726, USA
*
e-mail: [email protected]
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Abstract

The Sculptor dwarf Spheroidal is a Milky Way satellite with a dominant old (>10 Gyr) population that displays at least two distinct stellar populations. We present new sensitive imaging data from CTIO/MOSAIC and make a detailed study of the stellar populations of Sculptor, including the main sequence turnoff (MSTO) properties. We present the Star Formation History (SFH) and Metallicity Distribution Function (MDF) of the Sculptor dSph and find that a well-defined radial gradient is present not only in metallicity but now also in age.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 79 - 80
Copyright
© EAS, EDP Sciences, 2011

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References

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