Control sample for galaxy pairs: Simulations and observations

Several attempts have been made in order to isolate the effect of galaxy interactions by comparing galaxy in pairs with isolated galaxies. However, different authors have proposed different ways to build these control samples (CS). By using mock galaxy catalagues built up from the Millennium Simulat...

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Detalles Bibliográficos
Autores principales: Pérez, Josefa, Tissera, Patricia Beatriz
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Ciencias Astronómicas
Galaxies: evolution
Galaxies: interactions
Surveys
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82654
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82654
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxies: evolution
Galaxies: interactions
Surveys
spellingShingle Ciencias Astronómicas
Galaxies: evolution
Galaxies: interactions
Surveys
Pérez, Josefa
Tissera, Patricia Beatriz
Control sample for galaxy pairs: Simulations and observations
topic_facet Ciencias Astronómicas
Galaxies: evolution
Galaxies: interactions
Surveys
description Several attempts have been made in order to isolate the effect of galaxy interactions by comparing galaxy in pairs with isolated galaxies. However, different authors have proposed different ways to build these control samples (CS). By using mock galaxy catalagues built up from the Millennium Simulation, we show that the set of constrains used to define a CS might introduce biases which could affect the interpretation of results. In this analysis, we make use of the fact that the physics of interactions is not included in the semi-analytic model, so that any difference between the mock control and pair samples can be attributed to selection biases. Thus, we suggest how to build an unique and unbiased CS in order to individualize the effect of interactions. Based on this theoretical findings and using the SDSS-DR4 data, we revise some previous observational results of galaxy in pairs in order to evaluate any possible disagreement. The comparison between simulations and observations suggests an overestimated effect of the DM halo bias in semianalytical models.
format Articulo
Articulo
author Pérez, Josefa
Tissera, Patricia Beatriz
author_facet Pérez, Josefa
Tissera, Patricia Beatriz
author_sort Pérez, Josefa
title Control sample for galaxy pairs: Simulations and observations
title_short Control sample for galaxy pairs: Simulations and observations
title_full Control sample for galaxy pairs: Simulations and observations
title_fullStr Control sample for galaxy pairs: Simulations and observations
title_full_unstemmed Control sample for galaxy pairs: Simulations and observations
title_sort control sample for galaxy pairs: simulations and observations
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/82654
work_keys_str_mv AT perezjosefa controlsampleforgalaxypairssimulationsandobservations
AT tisserapatriciabeatriz controlsampleforgalaxypairssimulationsandobservations
bdutipo_str Repositorios
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