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\documentclass[craaa]{aaa2014}

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\usepackage[spanish,activeacute,english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{verbatim}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}

\begin{document}

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\journalvol{57}
\journalyear{2014}
\journaleditors{A.C. Rovero, C. Beaugé, L.J. Pellizza, M. Lares}

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\contriblanguage{0}

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\contribtype{2}

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%  11 [AEC]: Astrofísica Extragaláctica y Cosmología /                       %
%           Extragalactic Astrophysics and Cosmology                         %
%  12 [EG]: Estructura Galáctica / Galactic Structure                        %
%  13 [AE]: Astrofísica Estelar / Stellar Astrophysics                       %
%  14 [SE]: Sistemas Estelares / Stellar Systems                             %
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\thematicarea{11}

\title{Efecto de las barras en galaxias de n\'ucleos activos}

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\author{Alonso S.\inst{1,2}, Coldwell G.\inst{1,2}, Lambas D.G.\inst{1,2,3}}


\institute{Consejo Nacional de Investigaciones Cient\'{i}ficas y T\'ecnicas (CONICET)
          \and Facultad de Ciencias Exactas, F\'{i}sicas y Naturales, Universidad Nacional de San Juan (UNSJ)
          \and Observatorio Astron\'omico de C\'ordoba (OAC)
           }
         


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\abstract{En este trabajo se presenta un an\'alisis de las caracter\'isticas de las galaxias h\'uespedes de AGN y 
de la actividad
nuclear central en galaxias de n\'ucleos activos (AGN) con y sin barras.
Para tal fin, se seleccion\'o una muestra de galaxias espirales AGN barreadas, clasificadas por medio de
inspecci\'on visual, a partir del s\'eptimo relevamiento de Sloan Digital Sky Survey (SDSS-DR7).
Para obtener una apropiada cuantificaci\'on de los efectos de las barras, se obtuvo adem\'as una muestra control de
galaxias espirales AGN no-barreadas, con similares distribuciones de redshift,
luminosidad, masa en estrellas y ambiente de densidad local que las galaxias AGN barreadas.
Se encontr\'o que la fracci\'on de barras es 28.5$\%$, con respecto a la muestra total de galaxias AGN espirales,
en buen acuerdo con trabajos anteriores. Las galaxias AGN barreadas muestran un exceso de poblaci\'on estelar j\'oven
dominada por colores rojos, con respecto a la muestra control, sugiriendo que las barras producen un importante 
efecto en modificar las propiedades de las galaxias h\'uespedes de n\'ucleos activos.
Como trazador de la actividad nuclear se utiliz\'o la luminosidad del
OIII y la raz\'on de acreci\'on del agujero negro ($R=log(L[OIII]/M_{BH})$).
Se encontr\'o que las AGN con barras muestran un corrimiento
hacia mayores valores de $L[OIII]$, en comparaci\'on con su contraparte de galaxias AGN no-barreadas.
Este efecto es mas importante en galaxias menos masivas, con poblaciones
estelares j\'ovenes y azules.
Adem\'as, del an\'alisis de la raz\'on de acreci\'on del agujero negro, se observa que las AGN barreadas muestran un
exceso de objetos con mayores valores de $R$, con respecto a galaxias activas sin barras.
Estos resultados sugieren que las barras son eficientes mecanismos en transportar material hacia las
regiones mas internas de las galaxias, ayudando a activar/aumentar la actividad nuclear central de las galaxias AGN.
}

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%  Select the keywords that describe your contribution. They are mandatory,  %
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\keywords{Galaxies: formation --- galaxies: evolution --- galaxies: interactions}

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\mail{solalonsog@gmail.com}

\maketitle

\end{document}
