Bibcode
Battaglia, G.; Kacharov, N.; Rejkuba, M.
Referencia bibliográfica
Formation and Evolution of Galaxy Outskirts, Proceedings of the International Astronomical Union, IAU Symposium, Volume 321, pp. 28-30
Advertised on:
3
2017
Número de citas
0
Número de citas referidas
0
Descripción
Understanding the properties of dwarf galaxies is important not only to
put them in their proper cosmological context, but also to understand
the formation and evolution of the most common type of galaxies. Dwarf
galaxies are divided into two main classes, dwarf irregulars (dIrrs) and
dwarf spheroidals (dSphs), which differ from each other mainly because
the former are gas-rich objects currently forming stars, while the
latter are gas-deficient with no on-going star formation. Transition
types (dT) are thought to represent dIs in the process of losing their
gas, and can therefore shed light into the possible process of dwarf
irregulars (dIrrs) becoming gas-deficient, passively evolving galaxies.
Here we present preliminary results from our wide-area VLT/FORS2 MXU
spectroscopic survey of the Phoenix dT, from which we obtained
line-of-sight velocities and metallicities from the nIR Ca II triplet
lines for a large sample of individual Red Giant Branch stars.