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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731494.0, MPI für Astronomie / Publikationen_mpia
Stellar orbital properties as diagnostics of the origin of the stellar halo
Authors:Valluri, M.; Loebman, S. R.; Bailin, J.; Clarke, A.; Debattista, V. P.; Stinson, G.; Arnaboldi, M.; Rejkuba, M.; Romano, D.
Place of Publication:Cambridge
Publisher:Cambridge Univ. Press
Date of Publication (YYYY-MM-DD):2016
Audience:Not Specified
Abstract / Description:We examine metallicities, ages and orbital properties of halo stars in a Milky-Way like disk galaxy formed in the cosmological hydrodynamical MaGICC simulations. Halo stars were either accreted from satellites or they formed in situ in the disk or bulge of the galaxy and were then kicked up into the halo (``in situ/kicked-up'' stars). Regardless of where they formed both types show surprisingly similar orbital properties: the majority of both types are on short-axis tubes with the same sense of rotation as the disk - implying that a large fraction of satellites are accreted onto the halo with the same sense of angular momentum as the disk.
Free Keywords:Galaxy: halo; Galaxy: kinematics and dynamics; Galaxy: stellar content
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2016IAUS..317..358V
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