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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 742877.0, MPI für Astronomie / Publikationen_mpia
A VLT/FORS2 spectroscopic survey of individual stars in a transforming dwarf galaxy
Authors:Battaglia, G.; Kacharov, N.; Rejkuba, M.; Knapen, J. H.; Lee, J. C.
Place of Publication:Cambridge
Publisher:Cambridge Univ. Press
Date of Publication (YYYY-MM-DD):2017
Audience:Not Specified
Abstract / Description: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.
Free Keywords:techniques: spectroscopic; stars: abundances; galaxies: dwarf; galaxies: evolution; Local Group
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
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