Título

CHARACTERIZATION OF A SAMPLE OF INTERMEDIATE-TYPE AGN. I. Spectroscopic properties and serendipitous discovery of new Dual AGN

Autor

Vahram Chavushyan

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

Galaxies: active - (INSPEC) Galaxies: Seyfert - (INSPEC) Galaxies: nuclei - (INSPEC) Quasars:emission lines - (INSPEC) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) ASTRONOMÍA Y ASTROFÍSICA - (CTI) ASTRONOMÍA Y ASTROFÍSICA - (CTI)

Resumen o descripción

A sample of 10 nearby intermediate-type active galactic nuclei (AGN) drawn from the Sloan Digital Sky Survey (SDSS-DR7) is presented. The aim of this work is to provide estimations of the black hole mass for the sample galaxies from the dynamics of the broad line region. For this purpose, a detailed spectroscopic analysis of the objects was done. Using BPT diagnostic diagrams we have carefully classified the objects as true intermediate-type AGN and found that 80%⁺⁷˙²%₋₁₇̣ ̣₃% are composite AGN. The black hole mass estimated for the sample is within 6.54±0.16< log MBH <7.81±0.14.Profile analysis show that five objects (J120655.63+501737.1, J121607.08+504930.0, J141238.14+391836.5, J143031.18+524225.8 and J162952.88+242638.3) have narrow double-peaked emission lines in both the red (Hα, [N II]λλ6548,6583 and [S II]λλ6716,6731) and the blue (Hβ and [O III]λλ4959,5007) region of the spectra,with velocity differences (ΔV) between the double peaks within 114 <ΔV <256km s⁻¹. Two of them, J121607.08+504930.0 and J141238.14+391836.5 are candidates for dual AGN since their double-peaked emission lines are dominated by AGN activity. In searches of dual AGN; Type 1, Type 1I and intermediate-type AGN shouldbe carefully separated, due to the high serendipitous number of narrow double-peaked sources (50%±14.4%) found in our sample.

Editor

The Astrophysical Journal

Fecha de publicación

26 de noviembre de 2012

Tipo de publicación

Artículo

Versión de la publicación

Versión aceptada

Recurso de información

http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2220

Formato

application/pdf

Idioma

Inglés

Audiencia

Estudiantes

Investigadores

Público en general

Sugerencia de citación

Benítez, Erika., et al., (2012), CHARACTERIZATION OF A SAMPLE OF INTERMEDIATE-TYPE AGN. I. Spectroscopic properties and serendipitous discovery of new Dual AGN, The Astrophysical Journal, Vol. 763(1):1-37

Repositorio Orígen

Repositorio Institucional del INAOE

Descargas

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