Modelling galaxy merger time-scales and tidal destruction

Simha, Vimal; Cole, Shaun

doi:10.1093/mnras/stx1942

Modelling galaxy merger time-scales and tidal destruction

Simha, Vimal; Cole, Shaun

Authors

Vimal Simha

Professor Shaun Cole shaun.cole@durham.ac.uk
Director of the Institute for Computational Cosmology

Abstract

We present a model for the dynamical evolution of subhaloes based on an approach combining numerical and analytical methods. Our method is based on tracking subhaloes in an N-body simulation up to the latest epoch that it can be resolved, and applying an analytic prescription for its merger time-scale that takes dynamical friction and tidal disruption into account. When applied to cosmological N-body simulations with mass resolutions that differ by two orders of magnitude, the technique produces halo occupation distributions that agree to within 3 per cent. This model has now been implemented in the GALFORM semi-analytic model of galaxy formation.

Citation

Simha, V., & Cole, S. (2017). Modelling galaxy merger time-scales and tidal destruction. Monthly Notices of the Royal Astronomical Society, 472(2), 1392-1400. https://doi.org/10.1093/mnras/stx1942

Journal Article Type	Article
Acceptance Date	Jul 27, 2017
Online Publication Date	Aug 2, 2017
Publication Date	Dec 1, 2017
Deposit Date	Nov 1, 2017
Publicly Available Date	Nov 1, 2017
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	472
Issue	2
Pages	1392-1400
DOI	https://doi.org/10.1093/mnras/stx1942

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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.