A kinematic classification of the cosmic web
Entidad
UAM. Departamento de Física TeóricaEditor
Royal Astronomical Society; Oxford University PressFecha de edición
2012-09-21Cita
10.1111/j.1365-2966.2012.21553.x
Monthly Notices of the Royal Astronomical Society 425.3 (2012): 2049-2057
ISSN
0035-8711 (print); 1365-2966 (online)DOI
10.1111/j.1365-2966.2012.21553.xFinanciado por
This research has been partially supported by the Deutsche Forschungsgemeinschaft under grant GO 563/21-1. YH has been partially supported by the ISF (13/08). NIL acknowledges the support of the DFG and the hospitality of the KITP, supported in part by the National Science Foundation, under grant no. NSF PHY11-25915. AK is supported by the Spanish Ministerio de Ciencia e Innovación (MICINN) in Spain through the Ramón y Cajal programme as well as the grants AYA 2009-13875-C03-02, AYA2009-12792-C03-03, CSD2009-00064 and CAM S2009/ESP-1496. GY acknowledges support of MICINN (Spain) through research grants FPA2009-08958 and AYA2009-13875-C03-02 and through Consolider-Ingenio SyeC (CSD2007-0050).Proyecto
Comunidad de Madrid. S2009/ESP-1496 ASTROMADRIDVersión del editor
http://dx.doi.org/10.1111/j.1365-2966.2012.21553Materias
Cosmology; Dark matter; Large scale of Universe; Astronomía; FísicaNota
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2012 RAS @21012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reservedDerechos
© 2012 RAS; © 2012 The AuthorsResumen
A new approach for the classification of the cosmic web is presented. In extension of the previous work of Hahn et al. and Forero-Romero et al., the new algorithm is based on the analysis of the velocity shear tensor rather than the gravitational tidal tensor. The procedure consists of the construction of the shear tensor at each (grid) point in space and the evaluation of its three eigenvectors. A given point is classified to be either a void, sheet, filament or a knot according to the number of eigenvalues above a certain threshold, 0, 1, 2 or 3, respectively. The threshold is treated as a free parameter that defines the web. The algorithm has been applied to a dark matter only simulation of a box of side length 64h -1Mpc and N = 1024 3 particles within the framework of the 5-year Wilkinson and Microwave Anisotropy Probe/Λ cold dark matter (ΛCDM) model. The resulting velocity-based cosmic web resolves structures down to ≲0.1h -1Mpc scales, as opposed to the ≈1h -1Mpc scale of the tidal-based web. The underdense regions are made of extended voids bisected by planar sheets, whose density is also below the mean. The overdense regions are vastly dominated by the linear filaments and knots. The resolution achieved by the velocity-based cosmic web provides a platform for studying the formation of haloes and galaxies within the framework of the cosmic web
Lista de ficheros
Google Scholar:Hoffman, Yehuda
-
Metuki, Ofer
-
Yepes Alonso, Gustavo
-
Gottlöber, Stefan
-
Forero-Romero, Jaime E.
-
Libeskind, Noam I.
-
Knebe, Alexander
Lista de colecciones del ítem
Registros relacionados
Mostrando ítems relacionados por título, autor, creador y materia.