VOBOZ: An Almost-Parameter-Free Halo-Finding Algorithm

Details VOBOZ: An Almost-Parameter-Free Halo-Finding Algorithm VOBOZ: An Almost-Parameter-Free Halo-Finding Algorithm

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0907n&link_type=abstract

American Astronomical Society Meeting 204, #09.07; Bulletin of the American Astronomical Society, Vol. 36, p.793

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VOBOZ (VOronoi BOund Zones) is our new algorithm, with as little dependence on free parameters as we can manage, which finds haloes in N-body dark matter simulations. By using the Voronoi diagram, we achieve nonparametric, `natural' measurements of each particle's density and set of neighbors. We also measure the probability that every prospective halo (i.e. density peak) exists, meaning that it does not arise from Poisson noise. We also present some preliminary results which VOBOZ has produced. This work was supported by grants from NSF, NASA, and NCSA.

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