Cosmic Voids in Sloan Digital Sky Survey Data Release 7

By Danny Pan, Michael S. E. Vogeley, F. Hoyle, Yun-Young Choi, Changbom Park. 2011

191 citations recorded by the source corpus.

We study the distribution of cosmic voids and void galaxies using Sloan Digital Sky Survey Data Release 7 (SDSS DR7). Using the VoidFinder algorithm as described by Hoyle & Vogeley (2002), we identify 1054 statistically significant voids in the northern galactic hemisphere with radii > 10h 1 Mpc. The filling factor of voids in the sample volume is 62%. The largest void is just over 30h 1 Mpc in effective radius. The median effective radius is 17h 1 Mpc. The voids are found to be significantly underdense, with density contrast � < 0.85 at the edges of the voids. The radial density profiles of these voids are similar to predictions of dynamically distinct underdensities in gravitational theory. We find 8,046 galaxies brighter than Mr = 20.09 within the voids, accounting for 7% of the galaxies. We compare the results of VoidFinder on SDSS DR7 to mock catalogs generated from a SPH halo model simulation as well as other �-CDM simulations and find similar void fractions and void sizes in the data and simulations. This catalog is made publicly available at http://www.physics.drexel.edu/�pan/VoidCatalog for download.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9a7aa6b9452582bba0b56a82b0a14d5fba281273

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Citations in the corpus

Tracing the cosmic web (2017, background): “Recent studies have been mapping and cataloguing the void population in the Local Universe (Fairall 1998; Pan et al. 2012; Sutter et al. 2012), and even that in the implied dark matter distribution (Leclercq et al. 2015a).”