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dc.contributor.author
Perez, Maria Josefa

dc.contributor.author
Tissera, Patricia Beatriz

dc.contributor.author
Blaizot, Jeremy
dc.date.available
2017-07-28T16:07:56Z
dc.date.issued
2009-08
dc.identifier.citation
Perez, Maria Josefa; Tissera, Patricia Beatriz; Blaizot, Jeremy; Building a control sample for galaxy pairs; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 397; 2; 8-2009; 748-756
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/21510
dc.description.abstract
Several observational works have attempted to isolate the effects of galaxy interactions by comparing galaxies in pairs with isolated galaxies. However, different authors have proposed different ways to build these so-called control samples (CS). By using mock galaxy catalogues of the SDSS-DR4 built up from the Millennium Simulation, we explore how the way of building a CS might introduce biases which could affect the interpretation of results. We make use of the fact that the physics of interactions is not included in the semianalytic model, to infer that any difference between the mock control and pair samples can be ascribed to selection biases. Thus, we find that galaxies in pairs artificially tend to be older and more bulge-dominated, and to have less cold gas and different metallicities than their isolated counterparts. Also because of a biased selection, galaxies in pairs tend to live in higher density environments, and in haloes of larger masses. We find that imposing constraints on redshift, stellar masses and local densities diminishes the selection biases by ≈ 70%. Based on these findings, we suggest observers how to build an unique and unbiased CS in order to reveal the effect of galaxy interactions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc

dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Galaxies: Formation
dc.subject
Galaxies: Evolution
dc.subject
Galaxies: Interactions
dc.subject
Cosmology: Theory
dc.subject.classification
Astronomía

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Ciencias Físicas

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CIENCIAS NATURALES Y EXACTAS

dc.title
Building a control sample for galaxy pairs
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-28T15:04:32Z
dc.journal.volume
397
dc.journal.number
2
dc.journal.pagination
748-756
dc.journal.pais
Reino Unido

dc.journal.ciudad
Londres
dc.description.fil
Fil: Perez, Maria Josefa. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Tissera, Patricia Beatriz. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.description.fil
Fil: Blaizot, Jeremy. Universite Lyon 2; Francia
dc.journal.title
Monthly Notices of the Royal Astronomical Society

dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2009.15033.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1365-2966.2009.15033.x
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