AAS 204th Meeting, June 2004
Session 9 Clusters of Galaxies
Poster, Monday, May 31, 2004, 9:20am-6:30pm, Ballroom

[Previous] | [Session 9] | [Next]

[9.07] VOBOZ: An Almost-Parameter-Free Halo-Finding Algorithm

M. C. Neyrinck (JILA, APS, University of Colorado), N. Y. Gnedin (CASA, APS, University of Colorado), A. J. S. Hamilton (JILA, APS, University of Colorado)

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.

If you would like more information about this abstract, please follow the link to http://casa.colorado.edu/~neyrinck/voboz. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

[Previous] | [Session 9] | [Next]

Bulletin of the American Astronomical Society, 36 #2
© YEAR. The American Astronomical Soceity.