@misc{10481/82706,
year = {2023},
month = {3},
url = {https://hdl.handle.net/10481/82706},
abstract = {The present study addresses a key question related to our understanding of the relation between void galaxies and their
environment: the relationship between luminous and dark matter in and around voids.
Aims. To explore the extent to which local Universe voids are empty of matter, we study the full (dark+luminous) matter content of
seven nearby cosmic voids that are fully contained within the CosmicFlows-3 volume.
Methods. We obtained the matter-density profiles of seven cosmic voids using two independent methods. These were built from the
galaxy redshift space two-point correlation function in conjunction with peculiar velocity gradients from the CosmicFlows-3 dataset.
Results. The results are striking, because when the redshift survey is used, all voids show a radial positive gradient of galaxies, while
based on the dynamical analysis, only three of these voids display a clear underdensity of matter in their center.
Conclusions. This work constitutes the most detailed observational analysis of voids conducted so far, and shows that void emptiness
should be derived from dynamical information. From this limited study, the Hercules void appears to be the best candidate for a local
Universe pure “pristine volume”, expanding in three directions with no dark matter located in that void.},
organization = {Institut Universitaire de France},
organization = {Centre National D'etudes Spatiales},
organization = {Instituto de Salud Carlos III
Spanish Government},
organization = {European Commission	PID2020-224414GB-I00
PID2020-113689GB-I00},
organization = {Spanish Ministerio de Ciencia e Innovacion (MCIN)},
organization = {Agencia Estatal de Investigacion (AEI)},
organization = {European Social Fund (ESF)	20215AT016
CEX2020-001058-M},
organization = {Centro Superior de Investigaciones Cientificas (CSIC) under the PIE project	KR4598/2-1},
organization = {German Research Foundation (DFG)	PID2019-105602GBI00},
organization = {Junta de Andalucia},
organization = {Spanish Government	FQM108},
organization = {MCIN/AEI},
organization = {European Union NextGenerationEU},
organization = {Agencia Estatal de Investigacion Espanola (AEI)},
organization = {Center for Forestry Research & Experimentation (CIEF)	CEX2021-001131-S},
organization = {European Union-Next Generation EU Funds},
organization = {State Research Agency (AEI-MCINN) of the Spanish Ministry of Science and Innovation under the grant "The structure and evolution of galaxies and their central regions" - Ministry of Universities},
publisher = {EDP Sciences},
keywords = {Large-scale structure of Universe},
keywords = {Dark Matter},
title = {Sociology and hierarchy of voids: A study of seven nearby CAVITY galaxy voids and their dynamical CosmicFlows-3 environment},
doi = {10.1051/0004-6361/202245578},
author = {Courtois, H. M. and Domínguez Gómez, Jesús and Florido Navio, Estrella and García Benito, Rubén and Pérez Martín, María Isabel},
}