Observational evidence of fractality in the large-scale distribution of galaxies

For a sample of 133 991 galaxies distributed in the sky region 100° < a < 270° and 7° < δ < 65° with a redshift 0.0057 < z < 0.12, extracted from the SDSS NASA/AMES Value Added Galaxy Catalog (amesvagc), we estimate the fractal dimension D of its spatial distribution by means of tw...

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Autores principales: Canavesi, Tobías, Tapia, T. E.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Astronómicas
large-scale structure of universe
cosmology: observations
cosmology: miscellaneous
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/175913
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-175913
record_format dspace
spelling I19-R120-10915-1759132025-01-30T20:04:07Z http://sedici.unlp.edu.ar/handle/10915/175913 Observational evidence of fractality in the large-scale distribution of galaxies Canavesi, Tobías Tapia, T. E. 2021 2025-01-30T17:18:48Z en Ciencias Astronómicas large-scale structure of universe cosmology: observations cosmology: miscellaneous For a sample of 133 991 galaxies distributed in the sky region 100° < a < 270° and 7° < δ < 65° with a redshift 0.0057 < z < 0.12, extracted from the SDSS NASA/AMES Value Added Galaxy Catalog (amesvagc), we estimate the fractal dimension D of its spatial distribution by means of two different methods. First, using an algorithm to estimate the correlation dimension. The second method, in a novel approach, creates a graph from the data and estimates the graph dimension purely from connectivity information. By means of both methods we obtain D ~ 2 in spatial scales below 20 Mpc, which agrees with previous works. This result shows the non-homogeneity of galaxies distribution within the range of studied scales. Para una muestra de 133 991 galaxias distribuidas en la region del cielo 100° &lt; a &lt; 270° y 7° &lt; δ &lt; 65° con un redshift 0.0057 &lt; z &lt; 0.12, extraída del catálogo SDSS NASA/AMES Value Added Galaxy Catalog (ames-vagc), estimamos la dimensión fractal D de su distribución espacial mediante dos métodos diferentes. El primero usa un algoritmo para estimar la dimensión de correlación. El segundo método, en un enfoque novedoso, crea un grafo usando los datos y estima la dimensión del ismo basado únicamente en la información de conectividad. Mediante ambos métodos obtenemos D ~ 2 en escalas espaciales por debajo de 20 Mpc, lo cual concuerda con trabajos previos. Este resultado muestra la no homogeneidad de la distribución de las galaxias dentro del rango de escalas estudiadas. Asociación Argentina de Astronomía Articulo Articulo 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 201-203
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
large-scale structure of universe
cosmology: observations
cosmology: miscellaneous
spellingShingle Ciencias Astronómicas
large-scale structure of universe
cosmology: observations
cosmology: miscellaneous
Canavesi, Tobías
Tapia, T. E.
Observational evidence of fractality in the large-scale distribution of galaxies
topic_facet Ciencias Astronómicas
large-scale structure of universe
cosmology: observations
cosmology: miscellaneous
description For a sample of 133 991 galaxies distributed in the sky region 100° < a < 270° and 7° < δ < 65° with a redshift 0.0057 < z < 0.12, extracted from the SDSS NASA/AMES Value Added Galaxy Catalog (amesvagc), we estimate the fractal dimension D of its spatial distribution by means of two different methods. First, using an algorithm to estimate the correlation dimension. The second method, in a novel approach, creates a graph from the data and estimates the graph dimension purely from connectivity information. By means of both methods we obtain D ~ 2 in spatial scales below 20 Mpc, which agrees with previous works. This result shows the non-homogeneity of galaxies distribution within the range of studied scales.
format Articulo
Articulo
author Canavesi, Tobías
Tapia, T. E.
author_facet Canavesi, Tobías
Tapia, T. E.
author_sort Canavesi, Tobías
title Observational evidence of fractality in the large-scale distribution of galaxies
title_short Observational evidence of fractality in the large-scale distribution of galaxies
title_full Observational evidence of fractality in the large-scale distribution of galaxies
title_fullStr Observational evidence of fractality in the large-scale distribution of galaxies
title_full_unstemmed Observational evidence of fractality in the large-scale distribution of galaxies
title_sort observational evidence of fractality in the large-scale distribution of galaxies
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/175913
work_keys_str_mv AT canavesitobias observationalevidenceoffractalityinthelargescaledistributionofgalaxies
AT tapiate observationalevidenceoffractalityinthelargescaledistributionofgalaxies
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