The Formation of Shell Galaxies Similar to NGC 7600 in the Cold Dark Matter Cosmogony

Bibcode
2011ApJ...743L..21C
DOI
10.1088/2041-8205/743/1/L21
Cooper, Andrew P.; Martínez-Delgado, David; Helly, John; Frenk, Carlos; Cole, Shaun; Crawford, Ken; Zibetti, Stefano; Carballo-Bello, J. A.; GaBany, R. Jay
Bibliographical reference

The Astrophysical Journal Letters, Volume 743, Issue 1, article id. L21 (2011).

Advertised on:
12
2011
Number of authors
9
IAC number of authors
1
Citations
52
Refereed citations
46
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.
Related projects
Group members
Traces of Galaxy Formation: Stellar populations, Dynamics and Morphology
We are a large, diverse, and very active research group aiming to provide a comprehensive picture for the formation of galaxies in the Universe. Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand how galaxies came to be what we now observe.
Anna
Ferré Mateu
In progress
Type
Refereed
Galaxies

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