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MEGA: merger graphs of structure formation
Version 2 2023-06-12, 09:26
Version 1 2023-06-09, 21:02
journal contribution
posted on 2023-06-12, 09:26 authored by William J Roper, Peter ThomasPeter Thomas, Chaichalit SrisawatWhen following the growth of structure in the Universe, we propose replacing merger trees with merger graphs, in which haloes can both merge and split into separate pieces. We show that this leads to smoother mass growth and eliminates catastrophic failures in which massive haloes have no progenitors or descendants. For those who prefer to stick with merger trees, we find that trees derived from our merger graphs have similar mass growth properties to previous methods, but again without catastrophic failures. For future galaxy formation modelling, two different density thresholds can be used to distinguish host haloes (extended galactic haloes, groups and clusters) from higher-density subhaloes: sites of galaxy formation.
Funding
From merger trees to merger graphs: improved descriptions of halo growth; G2479; ROYAL ASTRONOMICAL SOCIETY
University of Sussex Astronomy Consolidated Grant 2017-2020; G2050; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P000525/1
History
Publication status
- Published
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- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
3Volume
494Page range
4509-4524Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2020-04-21First Open Access (FOA) Date
2020-04-21First Compliant Deposit (FCD) Date
2020-04-02Usage metrics
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