https://astrowiki.surrey.ac.uk/ 2026-04-30T17:52:07+00:00 https://astrowiki.surrey.ac.uk/ https://astrowiki.surrey.ac.uk/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-10-24T12:28:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:collision:mock_data:appendix&rev=1666614510&do=diff Appendix Stellar types in ''NBODY'' There 23 possible stellar types (KSTAR) in NBODY 0 Low main sequence (M < 0.7). 1 Main sequence. 2 Hertzsprung gap (HG). 3 Red giant. 4 Core Helium burning. 5 First AGB. 6 Second AGB. 7 Helium main sequence. 8 Helium HG. 9 Helium GB. 10 Helium white dwarf. 11 Carbon-Oxygen white dwarf. 12 Oxygen-Neon white dwarf. 13 … text/html 2022-10-24T12:28:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:collision:mock_data:challenge_1&rev=1666614510&do=diff Challenge 1: single mass clusters Isolated models: The N-body models can be described as: * Initial conditions: Plummer (1911), N = 32768, all stars the same mass * No primordial binaries, no central black hole * Isolation The data has the following format. Note that the first column can be used to recognise binaries (MN=2). The single components of the binaries are not given. text/html 2022-10-24T12:28:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:collision:mock_data:challenge_2&rev=1666614510&do=diff Challenge 2: Multi-mass clusters (no stellar evolution) Data: Snapshots of simulations with a mass function. * N <~= $10^5$, initial half-mass radius 2.25 pc, Henon isochrone model * Initial half-mass relaxation time =~ 350 Myr * no primordial binaries text/html 2022-10-24T12:28:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:collision:mock_data:challenge_3&rev=1666614510&do=diff Challenge 3. Clusters in tidal fields with stellar evolution (Simulations ran and kindly made available by Holger Baumgardt) Here we consider 2 clusters which are slightly more realistic: * IC: King (1966) W_0 = 5 model, N = 131072, Kroupa (2001) mass function between 0.1-15 Msun (no black-holes). text/html 2022-10-24T12:28:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://astrowiki.surrey.ac.uk/doku.php?id=tests:collision:mock_data:challenge_4&rev=1666614510&do=diff Challenge 4: M4 Method comparison: N-body model of M4 The mock data is a snapshots of large N-body simulation of the globular cluster M4 are available here. Full lists of data for all particles (mass, position, velocity, stellar type, stellar radius, V magnitude, B-V colour) are given at almost 400 instants in the lifetime of the model. The simulation is described in this paper