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Artículo

Interacting galaxies: corotating and counter-rotating systems with tidal tails

Mesa, Valeria AlejandraIcon ; Duplancic Videla, Maria FernandaIcon ; Alonso Giraldes, Maria SolIcon ; Coldwell Lloveras, Georgina VanesaIcon ; Garcia Lambas, Diego RodolfoIcon
Fecha de publicación: 02/2014
Editorial: Oxford University Press
Revista: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

We analyse interacting galaxy pairs with evidence of tidal features in the Sloan Digital Sky Survey Data Release 7. The pairs were selected within z < 0.1 by requiring a projected separation rp < 50 h− 1 kpc and relative radial velocity ΔV < 500 km s−1. We complete spectroscopic pairs using galaxies with photometric redshifts considering ΔVphot < 6800 km s−1, taking into account the mean photometric redshift uncertainty. We classify by visual inspection pairs of spirals into corotating and counter-rotating systems. For a subsample of non-active galactic nucleus (non-AGN) galaxies, counter-rotating pairs have larger star formation rates and a higher fraction of young, star-forming galaxies. These effects are enhanced by restricting to rp < 12 h− 1 kpc. The distributions of C, Dn(4000) and (Mu − Mr) for AGN galaxies show that counter-rotating hosts have bluer colours and younger stellar population than the corotating galaxies although the relative fractions of Seyfert, LINER, Composite and Ambiguous AGN are similar. Also, counter-rotating hosts have more powerful AGN as revealed by enhanced Lum[O III] values. The number of corotating systems is approximately twice the number of counter-rotating pairs which could be owed to a more rapid evolution of counter-rotating systems, besides possible different initial conditions of these interacting pairs.
Palabras clave: Galaxies , Interactions , Statistics , Starburst
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/5000
URL: http://mnras.oxfordjournals.org/content/438/2/1784
DOI: http://dx.doi.org/ 10.1093/mnras/stt2317
DOI: http://dx.doi.org/10.1093/mnras/stt2317
URL: http://arxiv.org/abs/1312.0560v1
Colecciones
Articulos(IANIGLA)
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos(ICATE)
Articulos de INST.D/CS ASTRONOMICAS D/LA TIERRA Y DEL ESPACIO
Citación
Mesa, Valeria Alejandra; Duplancic Videla, Maria Fernanda; Alonso Giraldes, Maria Sol; Coldwell Lloveras, Georgina Vanesa; Garcia Lambas, Diego Rodolfo; Interacting galaxies: corotating and counter-rotating systems with tidal tails; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 438; 2; 2-2014; 1784-1793
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