Year: 2019
Type: article
Abstract: Cosmicflows-3 distances and inferred peculiar velocities of galaxies have permitted the reconstruction of the structure of overdensities and underdensities within the volume extending to 0.05c. This study focuses on the underdense regions, particularly the Local Void that lies largely in the zone of obscuration and consequently has received limited attention. Major overdense structures that bound the Local Void are the Perseus-Pisces and Norma-Pavo-Indus filaments separated by 8500 km s−1. The void network of the universe is interconnected and void passages are found from the Local Void to the adjacent very large Hercules and Sculptor voids. Minor filaments course through voids. A particularly interesting example connects the Virgo and Perseus clusters, with several substantial galaxies found along the chain in the depths of the Local Void. The Local Void has a substantial dynamical effect, causing a deviant motion of the Local Group of 200–250 km s−1. The combined perturbations due to repulsion from the Local Void and attraction toward the Virgo Cluster account for ∼50% of the motion of the Local Group in the rest frame given by the cosmic microwave background.
Source: The Astrophysical Journal
Authors: R. Brent Tully, Daniel Pomarède, Romain Graziani, Hélène M. Courtois, Yehuda Hoffman, Edward J. Shaya
Institutions: University of Hawaiʻi at Mānoa, University of Hawaii System, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Lyon 1 Université, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules, Hebrew University of Jerusalem, University of Maryland, College Park
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: THIS STUDY ADDRESSES ONE OF THE KEY PROBLEMS IN COSMOLOGY: THE CAUSE OF THE EXTREME MOTION OF OUR GALAXY AND ITS COMPANIONS IN THE REFERENCE FRAME OF THE COSMIC MICROWAVE BACKGROUND. IT REMAINS TO BE DEMONSTRATED IF THE SOURCES OF THIS MOTION ARE COMPATIBLE WITH THE CURRENTLY POPULAR MODEL OF THE UNIVERSE., G1405808152, G6664731360, G7305349754
OpenAlex ID: W2963685189