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The origin of the Hubble sequence in ΛCDM cosmology

Benson, Andrew J. and Devereux, Nick (2010) The origin of the Hubble sequence in ΛCDM cosmology. Monthly Notices of the Royal Astronomical Society, 402 (4). pp. 2321-2334. ISSN 0035-8711. doi:10.1111/j.1365-2966.2009.16089.x.

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The galform semi-analytic model of galaxy formation is used to explore the mechanisms primarily responsible for the three types of galaxies seen in the local universe: bulge, bulge+disc and disc, identified with the visual morphological types E, S0/a-Sbc and Sc-Scd, respectively. With a suitable choice of parameters the galform model can accurately reproduce the observed local K_s-band luminosity function (LF) for galaxies split by visual morphological type. The successful set of model parameters is used to populate the Millennium Simulation with 9.4 million galaxies and their dark matter haloes. The resulting catalogue is then used to explore the evolution of galaxies through cosmic history. The model predictions concur with recent observational results including the galaxy merger rate, the star formation rate and the seemingly antihierarchical evolution of ellipticals. However, the model also predicts significant evolution of the elliptical galaxy LF that is not observed. The discrepancy raises the possibility that samples of z~1 galaxies which have been selected using colour and morphological criteria may be contaminated with galaxies that are not actually ellipticals.

Item Type:Article
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URLURL TypeDescription
Benson, Andrew J.0000-0001-5501-6008
Additional Information:© 2009 The Authors. Journal compilation © 2009 RAS. Accepted 2009 November 20. Received 2009 November 19; in original form 2009 September 30. AJB acknowledges support from the Gordon and Betty Moore Foundation and would like to acknowledge the hospitality of the KITP at the University of California, Santa Barbara, where part of this work was completed. This research was supported in part by the National Science Foundation under Grant No. NSF PHY05-51164.
Group:Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:galaxies: elliptical and lenticular, cD galaxies: evolution, galaxies: formation, galaxies: luminosity function, mass function galaxies: spiral galaxies: structure
Issue or Number:4
Record Number:CaltechAUTHORS:20100330-151338852
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Official Citation:Andrew J. Benson and Nick Devereux The origin of the Hubble sequence in ΛCDM cosmology MNRAS (2010) Vol. 402 2321-2334 doi:10.1111/j.1365-2966.2009.16089.x First published online March 1, 2010
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17823
Deposited By: Ruth Sustaita
Deposited On:30 Mar 2010 22:48
Last Modified:08 Nov 2021 23:39

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