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http://hdl.handle.net/20.500.12386/30320
Title: | The void size function in dynamical dark energy cosmologies | Authors: | Verza, Giovanni Pisani, Alice CARBONE, Carmelita Hamaus, Nico GUZZO, Luigi |
Issue Date: | 2019 | Journal: | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | Number: | 2019 | Issue: | 12 | First Page: | 040 | Abstract: | We test a theoretical description of the void size distribution function against direct estimates from halo catalogues of the DEMNUni suite of large cosmological simulations. Besides standard ΛCDM, we consider deviations of the dark energy equation of state from w=-1, corresponding to four combinations in the popular Chevallier-Polarski-Linder parametrisation: w0=-0.9 -1.1, wa=-0.3 0.3. The theoretical void size function model, relying on the Sheth & van de Weygaert double barrier excursion set formalism, provides an accurate description of the simulation measurements for the different dark energy models considered, within the statistical errors. The model remains accurate for any value of the threshold for void formation δv. Its robust consistency with simulations demonstrates that the theoretical void size function can be applied to real data as a sensitive tool to constrain dark energy. | URI: | http://hdl.handle.net/20.500.12386/30320 | URL: | https://iopscience.iop.org/article/10.1088/1475-7516/2019/12/040 | ISSN: | 1475-7516 | DOI: | 10.1088/1475-7516/2019/12/040 | Bibcode ADS: | 2019JCAP...12..040V | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Verza_1906.00409.pdf | preprint | 1.44 MB | Adobe PDF | View/Open |
Verza_2019_J._Cosmol._Astropart._Phys._2019_040.pdf | [Administrators only] | 1.81 MB | Adobe PDF |
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