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Perez, J.; Tissera, P.; Blaizot, J. "Building a control sample for galaxy pairs" (2009) Monthly Notices of the Royal Astronomical Society. 397(2):748-756
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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 Sloan Digital Sky Survey Data Release 4 buildup 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 are not included in the semi-analytic 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 per cent. Based on these findings, we suggest observers how to build a unique and unbiased CS in order to reveal the effect of galaxy interactions. © 2009 RAS.

Registro:

Documento: Artículo
Título:Building a control sample for galaxy pairs
Autor:Perez, J.; Tissera, P.; Blaizot, J.
Filiación:Instituto de Astronomíay Física Del Espacio, Conicet-UBA, CC67, Suc. 28, Ciudad de Buenos Aires, Argentina
Facultad de Ciencis Astronómicas y Geofísicas, Universidad Nacional de La Plata, Argentina
Université de Lyon, Lyon, F-69003, France
Université Lyon 1, Observatoire de Lyon, 9 avenue Charles André, Saint-Genis Laval, F-69230, France
CNRS, UMR 5574, Ecole Normale Supérieure de Lyon, Lyon, F-69007, France
Palabras clave:Cosmology: theory; Galaxies: evolution; Galaxies: formation; Galaxies: interactions
Año:2009
Volumen:397
Número:2
Página de inicio:748
Página de fin:756
DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15033.x
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v397_n2_p748_Perez

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Citas:

---------- APA ----------
Perez, J., Tissera, P. & Blaizot, J. (2009) . Building a control sample for galaxy pairs. Monthly Notices of the Royal Astronomical Society, 397(2), 748-756.
http://dx.doi.org/10.1111/j.1365-2966.2009.15033.x
---------- CHICAGO ----------
Perez, J., Tissera, P., Blaizot, J. "Building a control sample for galaxy pairs" . Monthly Notices of the Royal Astronomical Society 397, no. 2 (2009) : 748-756.
http://dx.doi.org/10.1111/j.1365-2966.2009.15033.x
---------- MLA ----------
Perez, J., Tissera, P., Blaizot, J. "Building a control sample for galaxy pairs" . Monthly Notices of the Royal Astronomical Society, vol. 397, no. 2, 2009, pp. 748-756.
http://dx.doi.org/10.1111/j.1365-2966.2009.15033.x
---------- VANCOUVER ----------
Perez, J., Tissera, P., Blaizot, J. Building a control sample for galaxy pairs. Mon. Not. R. Astron. Soc. 2009;397(2):748-756.
http://dx.doi.org/10.1111/j.1365-2966.2009.15033.x