Bibcode
Bettinelli, M.; Hidalgo, S. L.; Cassisi, S.; Aparicio, A.; Piotto, G.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 476, Issue 1, p.71-79
Fecha de publicación:
5
2018
Número de citas
26
Número de citas referidas
24
Descripción
We present the star formation history (SFH) of the Sextans dwarf
spheroidal galaxy based on deep archive B, I photometry taken with
Suprime-Cam at Subaru telescope focusing our analysis on the inner
region of the galaxy, fully located within the core radius. Within the
errors of our SFH, we have not detected any metallicity gradient along
the considered radial distance interval. As a main result of this work,
we can state that the Sextans dwarf spheroidal stopped forming stars
less than ˜1.3 Gyr after big bang in correspondence to the end of
the reionization epoch. We have been able to constrain the duration of
the main burst of star formation to ˜0.6 Gyr. From the calculation
of the mechanical luminosity released from supernovae (SNe) during the
brief episode of star formation, there are strong indications that SNe
could have played an important role in the fate of Sextans, by removing
almost completely the gas component, so preventing a prolonged star
formation.
Proyectos relacionados
Vía Láctea y galaxias cercanas
El objetivo general del Proyecto es el estudio de la estructura, historia evolutiva y proceso de formación de galaxias a través de sus poblaciones estelares resueltas, tanto a partir de fotometría como espectroscopia. El proyecto puede dividirse en cuatro líneas principales: I. Historia de formación estelar en el Grupo Local. El objetivo de esta
Martín
López Corredoira