Bibcode
Gallart, Carme; Aparicio, Antonio; Zinn, R.; Buonanno, R.; Hardy, E.; Marconi, G.
Referencia bibliográfica
Near-fields cosmology with dwarf elliptical galaxies, IAU Colloquium Proceedings of the international Astronomical Union 198, Held 14-18 March, Switzerland, edited by Jerjen, H.; Binggeli, B. Cambridge: Cambridge University Press, 2005., pp.25-29
Fecha de publicación:
0
2005
Número de citas
12
Número de citas referidas
11
Descripción
We present VLT-FORS1 color-magnitude diagrams (CMDs) reaching the oldest
main-sequence turnoffs for three fields at two galactocentric distances
in the Fornax dSph galaxy. We derive the star formation history (SFH)
for each field through comparison with synthetic CMDs and show that the
main epoch of star formation has extended to more recent epochs toward
the center of the galaxy. A small burst of star formation about 2 Gyr
ago is a robust feature in the SFH of all fields. It might be related to
the shell structure found in Fornax by Coleman et al. (2004), which in
turn has been interpreted as the relic of a merger event that occurred
in Fornax about 2 Gyr ago.