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The Canarias Einstein Ring: a Newly Discovered Optical Einstein Ring
Margherita Bettinelli, Matteo Simioni, Antonio Aparicio +5
We report the discovery of an optical Einstein Ring in the Sculptor constellation, IAC J010127-334319, in the vicinity of the Sculptor Dwarf Spheroidal Galaxy. It is an almost comp…
The ACS LCID project. IX. Imprints of the early Universe in the radial variation of the star formation history of dwarf galaxies
Sebastian L. Hidalgo, Matteo Monelli, Antonio Aparicio +8
Based on Hubble Space Telescope observations from the Local Cosmology from Isolated Dwarfs project, we present the star formation histories, as a function of galactocentric radius,…
Spatial dependence of the Star Formation History in the Central Regions of the Fornax Dwarf Spheroidal Galaxy
Andrés del Pino, Sebastian L. Hidalgo, Antonio Aparicio +5
We present the Star Formation History (SFH) and the age-metallicity relation (AMR) in three fields of the Fornax dwarf spheroidal galaxy. They sample a region spanning from the cen…
The Star Formation History of M32
Antonela Monachesi, Scott C. Trager, Tod R. Lauer +5
We use deep HST ACS/HRC observations of a field within M32 (F1) and an M31 background field (F2) to determine the star formation history (SFH) of M32 from its resolved stellar popu…
The ACS LCID project VII: the blue stragglers population in the isolated dSph galaxies Cetus and Tucana
M. Monelli, S. Cassisi, M. Mapelli +8
We present the first investigation of the Blue Straggler star (BSS) population in two isolated dwarf spheroidal galaxies of the Local Group, Cetus and Tucana. Deep HST/ACS photomet…
The ACS LCID project. V. The Star Formation History of the Dwarf Galaxy \objectname[]{LGS-3}: Clues for Cosmic Reionization and Feedback
Sebastian L. Hidalgo, Antonio Aparicio, Evan Skillman +11
We present an analysis of the star formation history (SFH) of the transition-type (dIrr/dSph) Local Group galaxy \objectname[]{LGS-3} (Pisces) based on deep photometry obtained wit…