Journal article
Cosmic voids in Sloan Digital Sky Survey Data Release 7
Monthly notices of the Royal Astronomical Society, v 421(2), pp 926-934
Jan 2012
Abstract
We study the distribution of cosmic voids and void galaxies using Sloan Digital Sky Survey Data Release 7 (SDSS DR7). Using the VoidFinder algorithm based on the original VoidFinder method devised by El-Ad & Piran and implemented by Hoyle & Vogeley, we identify 1054 statistically significant voids in the Northern galactic hemisphere with radii > 10 h
−1 Mpc. The filling factor of voids in the sample volume is 62 per cent. The largest void is just over 30 h
−1 Mpc in effective radius. The median effective radius is 17 h
−1 Mpc. The voids are found to be significantly underdense, with density contrast δ < − 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 8046 galaxies brighter than Mr
=− 20.09 within the voids, accounting for 7 per cent of the galaxies. We compare the results of VoidFinder on SDSS DR7 to mock catalogues generated from a smoothed particle hydrodynamics (SPH) halo model simulation as well as other Λ cold dark matter (ΛCDM) simulations and find similar void fractions and void sizes in the data and simulations. This catalogue is made publicly available at http://www.physics.drexel.edu/~pan/VoidCatalog for download.
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Details
- Title
- Cosmic voids in Sloan Digital Sky Survey Data Release 7
- Creators
- Danny C Pan - 1Department of Physics, Drexel University, Philadelphia, PA 19104, USAMichael S Vogeley - 1Department of Physics, Drexel University, Philadelphia, PA 19104, USAFiona Hoyle - 2Department of Physics and Astronomy, Widener University, Chester, PA 19013, USAYun-Young Choi - 4Department of Astronomy & Space Science, Kyung Hee University, Kyungki 446-701, KoreaChangbom Park - 5Korea Institute for Advanced Study, Seoul 130-722, Korea
- Publication Details
- Monthly notices of the Royal Astronomical Society, v 421(2), pp 926-934
- Publisher
- Blackwell Publishing Ltd; Oxford, UK
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000302695600002
- Scopus ID
- 2-s2.0-84858448913
- Other Identifier
- 991014878167304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics