A MegaCam Survey of Outer Halo Satellites. VI: The Spatially Resolved Star Formation History of the Carina Dwarf Spheroidal Galaxy
Felipe A. Santana, Ricardo R. Mu\~noz, T. J. L. de Boer, Joshua D., Simon, Marla Geha, Patrick C\^ot\'e, Andr\'es E. Guzm\'an, Peter Stetson, S., G. Djorgovski

TL;DR
This study provides a detailed, spatially resolved star formation history of the Carina dwarf galaxy, revealing two main star formation episodes and suggesting evolution independent of Milky Way tidal influences.
Contribution
First to combine deep, wide-field imaging with metallicity data to accurately trace Carina's star formation history and spatial variations.
Findings
Carina's star formation occurred in two main episodes separated by a gap.
Old stars constitute about 54% of the stellar mass within 1.3 times the tidal radius.
No recent star formation detected; blue plume likely due to blue stragglers.
Abstract
We present the spatially resolved star formation history (SFH) of the Carina dwarf spheroidal galaxy, obtained from deep, wide-field g,r imaging and a metallicity distribution from the literature. Our photometry covers deg, reaching up to times the half-light radius of Carina with a completeness higher than at , more than one magnitude fainter than the oldest turnoff. This is the first time a combination of depth and coverage of this quality has been used to derive the SFH of Carina, enabling us to trace its different populations with unprecedented accuracy. We find that Carina's SFH consists of two episodes well separated by a star formation temporal gap. These episodes occurred at old ( Gyr) and intermediate (- Gyr) ages. Our measurements show that the old episode comprises the majority of the population, accounting for of…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
