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Angular momentum evolution in dark-matter haloes

Book, Laura G. and Brooks, Alyson and Peter, Annika H. G. and Benson, Andrew J. and Governato, Fabio (2011) Angular momentum evolution in dark-matter haloes. Monthly Notices of the Royal Astronomical Society, 411 (3). pp. 1963-1976. ISSN 0035-8711. doi:10.1111/j.1365-2966.2010.17824.x.

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We have analysed high-resolution N-body simulations of dark-matter (DM) haloes, focusing specifically on the evolution of angular momentum. We find that not only is individual particle angular momentum not conserved, but the angular momentum of radial shells also varies over the age of the Universe by up to factors of a few. We find that torques from external structure are the most likely cause for this distribution shift. Since the model of adiabatic contraction that is often applied to model the effects of galaxy evolution on the DM density profile in a halo assumes angular momentum conservation, this variation implies that there is a fundamental limit on the possible accuracy of the adiabatic contraction model in modelling the response of DM haloes to the growth of galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription
Peter, Annika H. G.0000-0002-8040-6785
Benson, Andrew J.0000-0001-5501-6008
Additional Information:© 2010 The Authors. Monthly Notices of the Royal Astronomical Society © 2010 RAS. Accepted 2010 October 5. Received 2010 October 4; in original form 2010 June 21. Article first published online: 25 Nov 2010. LGB acknowledges the support of the NSF Graduate Fellowship Program. AHGP and AJB are supported by the Gordon and Betty Moore Foundation. AB is supported by the Sherman Fairchild Foundation. All simulations were run with resources at the NASA Advanced Supercomputing Division.
Group:Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
NSF Graduate Research FellowshipUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Sherman Fairchild FoundationUNSPECIFIED
Subject Keywords:galaxies: haloes; galaxies: kinematics and dynamics
Issue or Number:3
Record Number:CaltechAUTHORS:20110322-091233054
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Official Citation:Laura G. Book, Alyson Brooks, Annika H. G. Peter, Andrew J. Benson, and Fabio Governato Angular momentum evolution in dark-matter haloes MNRAS (2011) Vol. 411 1963-1976 doi:10.1111/j.1365-2966.2010.17824.x First published online March 1, 2011
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23028
Deposited By: Ruth Sustaita
Deposited On:22 Mar 2011 18:26
Last Modified:09 Nov 2021 16:10

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