Using the results of a high mass resolution ($256^{3}$ particles) N-body simulation of a cluster-forming region, we study the statistic $\sigma_{v}-M$ for low mass halos (${\rm M} < 10^{12} {\rm M}_{\sun}$), and we compare it with three... more
Using the results of a high mass resolution ($256^{3}$ particles) N-body simulation of a cluster-forming region, we study the statistic $\sigma_{v}-M$ for low mass halos (${\rm M} < 10^{12} {\rm M}_{\sun}$), and we compare it with three theoretical models. At the final redshift halos are well described by the Truncated Isothermal Sphere model recently introduced by Shapiro, Iliev & Raga (1999). We speculate that this is a consequence of the action of tidal fields on galaxy formation within clusters.
1 Astrophysical Observatory of Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY van@sunct.ct.astro.it,ube@sunct.ct.astro.it 2 Istituto di Astronomia, Universit`a di Catania, Citt`a Universitaria, Viale A. Doria 6,... more
1 Astrophysical Observatory of Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY van@sunct.ct.astro.it,ube@sunct.ct.astro.it 2 Istituto di Astronomia, Universit`a di Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY ...
Publication Date: 1999
Publication Name: Lecture Notes in Computer Science
The authors have designed and tested a new parallel N-body code to perform simulations of the formation and evolution of the large-scale structure of the Universe. At variance with the molecular dynamics case, N-body codes are able to... more
The authors have designed and tested a new parallel N-body code to perform simulations of the formation and evolution of the large-scale structure of the Universe. At variance with the molecular dynamics case, N-body codes are able to deal with the complexities of the truly long-range, gravitational interaction. the code is based on a work- and data-sharing scheme, and has
