CosmoBolognaLib

Wed, 01 Nov 2017 00:00:00 +0000

Role: contributor — void size function modelling and void-catalogue cleaning. Stack: C++ libraries with a SWIG-generated Python wrapper. Author & maintainer: Federico Marulli (Università di Bologna).

CosmoBolognaLib (CBL) is a living project that provides a common numerical environment for cosmological investigations of the large-scale structure of the Universe. Its focus is handling astronomical catalogues — real and simulated — measuring one-, two- and three-point statistics in configuration space, and running cosmological analyses.

My contribution is the set of tools for cosmic voids: the algorithm that redefines void ridges and therefore their radii, together with the model for the void size function. The cleaning procedure takes a void catalogue produced by a void finder and returns a catalogue of non-overlapping spheres, each embedding a fixed density contrast in the tracer density field — which is what makes the measured size function comparable with theoretical predictions. These functions were released in CBL v3.2 and are credited in the library’s changelog to Ronconi & Marulli (2017).

The tooling underpins the void work described in my , and was subsequently adopted in Key Projects within the Euclid Collaboration to forecast the cosmological constraining power of void statistics.

The void tools are presented in Astronomy & Astrophysics 607, A24 (2017) — see . The library itself is described in Marulli, Veropalumbo & Moresco (2016).

Cosmic Voids |

CosmoBolognaLib