2006/01/12 by A. Del Popolo, Antonino Del Popolo · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Astronomy #Astrophysics #Digital Image Processing Techniques #Galaxy #Halo #Mathematical Approximation and Integration #Number density #Physics #Topological and Geometric Data Analysis #astro-ph
paper · pdf · doi:10.1086/498295
published as Astrophys.J. 637 (2006) 12-18
openalex publication_date 2006/01/12 · arxiv created 2006/09/05 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
I compare the numerical multiplicity function recently given by Yahagi et al. with the theoretical multiplicity function obtained by means of the excursion set model and an improved version of the barrier shape obtained by Del Popolo & Gambera, which implicitly takes into account the total angular momentum acquired by the protostructure during evolution and a nonzero cosmological constant. I show that the multiplicity function obtained here is in better agreement with the recent simulations of Yahagi et al. than other previous models (Sheth & Tormen; Sheth et al.; Jenkins et al.) and that, unlike some previous multiplicity function models (Jenkins et al.; Yahagi et al.), it was obtained from a sound theoretical background.