Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 472, Issue 2, Pages 1392-1400Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1942
Keywords
galaxies: general; galaxies: groups: general; galaxies: haloes; galaxies: interactions
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Funding
- Science and Technology Facilities Council [ST/L00075X/1]
- BIS National E-infrastructure capital grant [ST/K00042X/1]
- STFC capital grant [ST/H008519/1]
- STFC DiRAC Operations grant [ST/K003267/1]
- Durham University
- STFC [ST/K00042X/1, ST/L00075X/1, ST/H008519/1, ST/I00162X/1, ST/P000541/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H008519/1, ST/P000541/1, ST/I00162X/1, ST/L00075X/1, ST/K00042X/1] Funding Source: researchfish
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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 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.
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