Mañana, JUEVES, 24 DE ABRIL, el sistema se apagará debido a tareas habituales de mantenimiento a partir de las 9 de la mañana. Lamentamos las molestias.
A kinematic classification of the cosmic web
Entity
UAM. Departamento de Física TeóricaPublisher
Royal Astronomical Society; Oxford University PressDate
2012-09-21Citation
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.xFunded by
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).Project
Comunidad de Madrid. S2009/ESP-1496 ASTROMADRIDEditor's Version
http://dx.doi.org/10.1111/j.1365-2966.2012.21553Subjects
Cosmology; Dark matter; Large scale of Universe; Astronomía; FísicaNote
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 reservedRights
© 2012 RAS; © 2012 The AuthorsAbstract
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
Files in this item
Google Scholar:Hoffman, Yehuda
-
Metuki, Ofer
-
Yepes Alonso, Gustavo
-
Gottlöber, Stefan
-
Forero-Romero, Jaime E.
-
Libeskind, Noam I.
-
Knebe, Alexander
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.