  Dwarf spheroidal galaxies are regarded as the basic building blocks in the
formation of larger galaxies and are believed to be the most dark matter
dominated systems known in the Universe. There are several models that attempt
to explain their formation and evolution, but they have problems to model the
formation of isolated dwarf spheroidal galaxies. Here, we will explain a
possible formation scenario in which star clusters form inside the dark matter
halo of a dwarf spheroidal galaxy. Those star clusters suffer from low star
formation efficiency and dissolve while orbiting inside the dark matter halo.
Thereby, they build the faint luminous components that we observe in dwarf
spheroidal galaxies. In this paper we study this model by adding different star
formation histories to the simulations to compare the results with our previous
work and observational data to show that we can explain the formation of dwarf
spheroidal galaxies.
