Cosmological numerical simulations

Initial conditions for typical portions of the Universe are studied. Using the kinematic Zeldovich approximation we set the primeval density perturbations corresponding to the standard random phase Cold Dark Matter scenario (CDM). In the CDM models we verify that it is necessary to bias the galaxy d...

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Detalles Bibliográficos
Autores principales: Abadi, Mario Gabriel, García-Lambas, D.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1990
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/143244
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-143244
record_format dspace
spelling I19-R120-10915-1432442024-03-19T15:20:23Z http://sedici.unlp.edu.ar/handle/10915/143244 Cosmological numerical simulations Abadi, Mario Gabriel García-Lambas, D. 1990 2022-10-04T13:36:37Z es Astronomía Galaxia Initial conditions for typical portions of the Universe are studied. Using the kinematic Zeldovich approximation we set the primeval density perturbations corresponding to the standard random phase Cold Dark Matter scenario (CDM). In the CDM models we verify that it is necessary to bias the galaxy distribution with respect to the mass distribution in order to satisfy simultaneously the amplitude and power of the spatial two point correlation function. It is seen the difference between these distributions, where the "galaxy" distribution was obtained by a prescription that assigns galaxies only to those particles that have more than a certain number of neighbors on a given scale (3 Mpc). This procedure is equivalent to the assumption of the existence of astrophysical mechanisms that induced galaxy formation. The mass and "galaxy" two point functions are power laws differing only their amplitudes. We note that the simulated galaxy distribution has similar properties than the observations. We are presently studying the implementation of statistical methods that say provide useful information concerning the filamentary structure in both observations and simulations. The techniques being studied may provide important information and permit characterizations of models and observations where the usual n-point functions give partial information. Asociación Argentina de Astronomía Articulo Comunicacion http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Galaxia
spellingShingle Astronomía
Galaxia
Abadi, Mario Gabriel
García-Lambas, D.
Cosmological numerical simulations
topic_facet Astronomía
Galaxia
description Initial conditions for typical portions of the Universe are studied. Using the kinematic Zeldovich approximation we set the primeval density perturbations corresponding to the standard random phase Cold Dark Matter scenario (CDM). In the CDM models we verify that it is necessary to bias the galaxy distribution with respect to the mass distribution in order to satisfy simultaneously the amplitude and power of the spatial two point correlation function. It is seen the difference between these distributions, where the "galaxy" distribution was obtained by a prescription that assigns galaxies only to those particles that have more than a certain number of neighbors on a given scale (3 Mpc). This procedure is equivalent to the assumption of the existence of astrophysical mechanisms that induced galaxy formation. The mass and "galaxy" two point functions are power laws differing only their amplitudes. We note that the simulated galaxy distribution has similar properties than the observations. We are presently studying the implementation of statistical methods that say provide useful information concerning the filamentary structure in both observations and simulations. The techniques being studied may provide important information and permit characterizations of models and observations where the usual n-point functions give partial information.
format Articulo
Comunicacion
author Abadi, Mario Gabriel
García-Lambas, D.
author_facet Abadi, Mario Gabriel
García-Lambas, D.
author_sort Abadi, Mario Gabriel
title Cosmological numerical simulations
title_short Cosmological numerical simulations
title_full Cosmological numerical simulations
title_fullStr Cosmological numerical simulations
title_full_unstemmed Cosmological numerical simulations
title_sort cosmological numerical simulations
publishDate 1990
url http://sedici.unlp.edu.ar/handle/10915/143244
work_keys_str_mv AT abadimariogabriel cosmologicalnumericalsimulations
AT garcialambasd cosmologicalnumericalsimulations
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