Author/Authors :
Enrico V. Held، نويسنده , , Eline Tolstoy، نويسنده , , Luca Rizzi، نويسنده , , Mary Cesetti، نويسنده , , Andrew A. Cole، نويسنده , , Giuseppina Battaglia، نويسنده , , Gary S. Da Costa، نويسنده , , Marco Gullieuszik، نويسنده , , Mario Mateo، نويسنده , , Edward W. Olszewski، نويسنده , , Matthew G. Walker، نويسنده ,
Abstract :
We present the first results of a comprehensive HST study of the star-formation history of Fornax dSph, based on WFPC2 imaging of 7 Fornax fields. Our observations reach the oldest main-sequence turnoffs, allowing us to address fundamental questions of dwarf galaxy evolution, such as the spatial variations in the stellar content, and whether the old stellar population is made up of stars formed in a very early burst or the result of a more continuous star formation.
