Redshift-space limits of bound structures
dc.contributor.author | Dünner, R | |
dc.contributor.author | Reisenegger, A | |
dc.contributor.author | Meza, A | |
dc.contributor.author | Araya, PA | |
dc.contributor.author | Quintana, H | |
dc.date.accessioned | 2024-07-06T14:28:23Z | |
dc.date.available | 2024-07-06T14:28:23Z | |
dc.date.issued | 2007-04-21 | |
dc.description | INDEXACIÓN: WEB OF SCIENCE. | |
dc.description.abstract | An exponentially expanding Universe, possibly governed by a cosmological constant, forces gravitationally bound structures to become more and more isolated, eventually becoming causally disconnected from each other and forming so-called 'island universes'. This new scenario reformulates the question about which will be the largest structures that will remain gravitationally bound, together with requiring a systematic tool that can be used to recognize the limits and mass of these structures from observational data, namely redshift surveys of galaxies. Here we present a method, based on the spherical collapse model and N-body simulations, by which we can estimate the limits of bound structures as observed in redshift space. The method is based on a theoretical criterion presented in a previous paper that determines the mean density contrast that a spherical shell must have in order to be marginally bound to the massive structure within it. Understanding the kinematics of the system, we translated the real-space limiting conditions of this 'critical' shell to redshift space, producing a projected velocity envelope that only depends on the density profile of the structure. From it we created a redshift-space version of the density contrast that we called 'density estimator', which can be calibrated from N-body simulations for a reasonable projected velocity envelope template, and used to estimate the limits and mass of a structure only from its redshift-space coordinates. | |
dc.identifier.citation | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Volume 376, Issue 4, Page 1577-1587 | |
dc.identifier.doi | 10.1111/j.1365-2966.2007.11550.x | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | https://repositorio.unab.cl/handle/ria/58248 | |
dc.language.iso | en | |
dc.publisher | Oxford University Press | |
dc.subject | methods : N-body simulations | |
dc.subject | galaxies : clusters : general | |
dc.subject | galaxies : kinematics and dynamics | |
dc.subject | large-scale structure of Universe | |
dc.title | Redshift-space limits of bound structures | |
dc.type | Artículo |
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