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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 606511.0, MPI für Astronomie / Publikationen_mpia
The formation of shell galaxies similar to NGC 7600 in the cold dark matter cosmogony
Authors:Cooper, A. P.; Martínez-Delgado, D.; Helly, J.; Frenk, C.; Cole, S.; Crawford, K.; Zibetti, S.; Carballo-Bello, J. A.; GaBany, R. J.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:The Astrophysical Journal Letters
Volume:743
Issue / Number:1
Audience:Not Specified
Abstract / Description:We present new deep observations of "shell" structures in the halo of the nearby elliptical galaxy NGC 7600, alongside a movie of galaxy formation in a cold dark matter (CDM) universe. The movie, based on an ab initio cosmological simulation, shows how continuous accretion of clumps of dark matter and stars creates a swath of diffuse circumgalactic structures. The disruption of a massive clump on a near-radial orbit creates a complex system of transient concentric shells which bare a striking resemblance to those of NGC 7600. With the aid of the simulation we interpret NGC 7600 in the context of the CDM model.
Free Keywords:galaxies: elliptical and lenticular; cD; galaxies: halos; galaxies: individual: NGC 7600; galaxies: kinematics and dynamics; galaxies: peculiar; galaxies: structure
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2011ApJ...743L..21C
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