Speaker
Dr
Menquan Liu
(Shanghai Astronomical Observatory)
Description
Iron-peak element distribution is very important for research of
the evolution of dwarf spheroidal galaxies (dSphs). Manganese (Mn)
is the most observed element for local dSphs in the iron-peak
elements (except Fe). In this paper, an improved model, more
reasonable supernova nucleosynthesis and supernova explosion rates
are used to investigate the Mn evolution of three local dSphs:
Fornax, Sulptor and Sextans. Our model can fit the main observation
of Mn distribution for these local dSphs. The results indicate the
current estimated star formation history of these dSphs is reliable
and consistent with the observational data of Mn (except the
Sculptor dSphs at [Fe/H]$>$-1.3). The results also give some limit
to the supernova nucleosynthesis. For example, the assumption of
metellicity-dependant Mn yield is not necessary because we can
explain the observation without it.
Primary author
Dr
Menquan Liu
(Shanghai Astronomical Observatory)
