Spatial dependence of the star formation history in the central regions of the Fornax dwarf spheroidal galaxy

Bibcode
2013MNRAS.433.1505D
DOI
10.1093/mnras/stt833
del Pino, A.; Hidalgo, S. L.; Aparicio, A.; Gallart, C.; Carrera, R.; Monelli, M.; Buonanno, Roberto; Marconi, Gianni
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 433, Issue 2, p.1505-1516

Advertised on:
8
2013
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
8
IAC number of authors
6
Citations
52
Refereed citations
45
Description
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 centre of the galaxy to beyond one core radius, which allows studying galactocentric gradients. In all the cases, we found stars as old as 12 Gyr, together with intermediate-age and young stellar populations. The last star formation events, as young as 1 Gyr old, are mainly located in the central region, which may indicate that the gas reservoir in the outer parts of the galaxy would have been exhausted earlier than in the centre or removed by tidal interactions. The AMR is smoothly increasing in the three analysed regions and similar to each other, indicating that no significant metallicity gradient is apparent within and around the core radius of Fornax. No significant traces of global UV-reionization or local SNe feedback are appreciated in the early SFH of Fornax. Our study is based on VLT photometry as deep as I ˜ 24.5 and the IAC-STAR/IAC-POP/MINNIAC suite of codes for the determination of the SFH in resolved stellar populations.
Related projects
Superposition of model of long-bar+3-kpc arm of López-Corredoira et al. (2026, A&A 708, A288) with the artistic representation of the annotated ‘Road Map to the Milky Way’ by NASA/JPL-Caltech/R. Hurt (SSC/Caltech) based on NASA’s Spitzer Space Telescope achievements.
Milky Way and Nearby Galaxies
The overall aim of the project is to study the morphology, stellar populations, kinematics and dynamics (including formation and evolution) of the Milky Way and its satellite galaxies and other Local Group galaxies. The project can be divided into two main lines: I. Structure of the Milky Way and nearby galaxies. The detailed study of the
Martín
López Corredoira
In progress
A view of our Milky Way galaxy with its close neighbors the Magellanic Clouds
Galaxy Evolution in the Local Group
Galaxy formation and evolution is a fundamental Astrophysical problem. Its study requires “travelling back in time”, for which there are two complementary approaches. One is to analyse galaxy properties as a function of red-shift. Our team focuses on the other approach, called “Galactic Archaeology”. It is based on the determination of galaxy
Emma
Fernández Alvar
In progress
Type
Refereed
The Milky Way and the Local Group (MWLG)
Galaxies
Local Group
Early universe

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