M67: Data

Initial conditions

Below you can find some preliminary initial data sets for simulating M67. Each of the models consists of 40,000 stars (after Hurley, et al. 2001), arranged as a King model with W₀= 7. Three King radii (1.0, 2.5 pc, and Roche-lobe filling) are considered. For each radius, six separate binarity fractions (0, 10, 25, 50, 75 and 100%) are provided.

For the 1- and 2.5-parsec radii models, the tidal radius is set at 17 parsecs (derived from a Galactic orbital speed of 350 km s^-1, and a Galactocentric radius of 8.5 kpc; q.v. Hurley, et al. 2001)

At the moment, we offer these initial data sets in both Starlab and NEMO formats.

Download initial data

A word about nomenclature: each run, and therefore each initial data file, is uniquely identified by five parameters. N40k refers to the initial number of cluster particles, fourty thousand in this case. W7 indicates a King model with the parameter W₀= 7, with a King radius of X.X parsecs, given by the RXXpc term. The TF3 field refers to the internal ... Bfxxx gives the binarity fraction as a percentile; i.e., Bf050 refers to 50% binarity.

The files below are not available via the web page, but can be requested in any format via the wap page coordinator by sending an email

Starlab

NEMO

To Simon Portegies Zwart's home page
To the Astronomical institute Anton Pannekoek home page
To the Section Computational Science home page