Siblings, friends and acquaintances: testing galaxy association methods

In order to constraint the limitations of association methods applied to galaxy surveys, we analysed the catalogue of halos at z=0 of a cosmological simulation, trying to reproduce the limitations that an observational survey deal with. We focused in the percolation method, usually called Friends of...

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Detalles Bibliográficos
Autores principales:	Caso, Juan Pablo, Vega Martínez, Cristian Antonio
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2019
Materias:	Astronomía Galaxies: statistics Galaxies: distances and redshifts Galaxies: clusters: general
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/129621
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-129621
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Astronomía Galaxies: statistics Galaxies: distances and redshifts Galaxies: clusters: general
spellingShingle	Astronomía Galaxies: statistics Galaxies: distances and redshifts Galaxies: clusters: general Caso, Juan Pablo Vega Martínez, Cristian Antonio Siblings, friends and acquaintances: testing galaxy association methods
topic_facet	Astronomía Galaxies: statistics Galaxies: distances and redshifts Galaxies: clusters: general
description	In order to constraint the limitations of association methods applied to galaxy surveys, we analysed the catalogue of halos at z=0 of a cosmological simulation, trying to reproduce the limitations that an observational survey deal with. We focused in the percolation method, usually called Friends of Friends method, commonly used in literature. The analysis was carried on the dark matter cosmological simulation MDPL2, from the Multidark project. Results point to a large fraction of contaminants for massive halos in high density environments. Thresholds in the association parameters and the subsequent analysis of observational properties can mitigate the occurrence of fake positives. The use of tests for substructures can also be efficient in particular cases.
format	Articulo Preprint
author	Caso, Juan Pablo Vega Martínez, Cristian Antonio
author_facet	Caso, Juan Pablo Vega Martínez, Cristian Antonio
author_sort	Caso, Juan Pablo
title	Siblings, friends and acquaintances: testing galaxy association methods
title_short	Siblings, friends and acquaintances: testing galaxy association methods
title_full	Siblings, friends and acquaintances: testing galaxy association methods
title_fullStr	Siblings, friends and acquaintances: testing galaxy association methods
title_full_unstemmed	Siblings, friends and acquaintances: testing galaxy association methods
title_sort	siblings, friends and acquaintances: testing galaxy association methods
publishDate	2019
url	http://sedici.unlp.edu.ar/handle/10915/129621
work_keys_str_mv	AT casojuanpablo siblingsfriendsandacquaintancestestinggalaxyassociationmethods AT vegamartinezcristianantonio siblingsfriendsandacquaintancestestinggalaxyassociationmethods
bdutipo_str	Repositorios
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Siblings, friends and acquaintances: testing galaxy association methods

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