Chemical abundances in Seyfert galaxies – V. The discovery of shocked emission outside the AGN ionization axis

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  • R A Riffel
    Departamento de Física, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria , 97105-900 Santa Maria , RS, Brazil
  • O L Dors
    Instituto de Pesquisa & Desenvolvimento, Universidade do Vale do Paraíba , Av. Shishima Hifumi, 2911, 12244-000 São José dos Campos Cep, SP, Brazil
  • M Armah
    Instituto de Pesquisa & Desenvolvimento, Universidade do Vale do Paraíba , Av. Shishima Hifumi, 2911, 12244-000 São José dos Campos Cep, SP, Brazil
  • T Storchi-Bergmann
    Instituto de Física, Universidade Federal do Rio Grande do Sul , CP 15051, Porto Alegre , RS 91501-970, Brazil
  • A Feltre
    Italian National Institute for Astrophysics – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna , Via P. Gobetti 93/3, I-40129 Bologna, Italy
  • G F Hägele
    Instituto de Astrofísica de La Plata (CONICET-UNLP) , Argentina
  • M V Cardaci
    Instituto de Astrofísica de La Plata (CONICET-UNLP) , Argentina
  • D Ruschel-Dutra
    Departamento de Física, Universidade Federal de Santa Catarina , P.O. Box 476, 88040-900 Florianópolis, SC, Brazil
  • A C Krabbe
    Instituto de Pesquisa & Desenvolvimento, Universidade do Vale do Paraíba , Av. Shishima Hifumi, 2911, 12244-000 São José dos Campos Cep, SP, Brazil
  • E Pérez-Montero
    Instituto de Astrofísica de Andalucía , Camino Bajo de Huétor s/n, Aptdo. 3004, Granada E-18080, Spain
  • N L Zakamska
    Department of Physics & Astronomy, Johns Hopkins University , Bloomberg Center, 3400 N. Charles St, Baltimore, MD 21218, USA
  • I C Freitas
    Colégio Politécnico, Universidade Federal de Santa Maria , Santa Maria 97105-900, RS, Brazil

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<jats:title>ABSTRACT</jats:title> <jats:p>We present maps for the electron temperature in the inner kpc of three luminous Seyfert galaxies: Mrk 79, Mrk 348, and Mrk 607 obtained from Gemini Multi-Object Spectrograph-integral field unit observations at spatial resolutions of ∼110–280 pc. We study the distributions of electron temperature in active galaxies and find temperatures varying in the range from ∼8000 to $\gtrsim 30\, 000\,$K. Shocks due to gas outflows play an important role in the observed temperature distributions of Mrk 79 and Mrk 348, while standard photoionization models reproduce the derived temperature values for Mrk 607. In Mrk 79 and Mrk 348, we find direct evidence for shock ionization with overall orientation orthogonal to the ionization axis, where shocks can be easily observed as the active galactic nuclei radiation field is shielded by the nuclear dusty torus. This also indicates that even when the ionization cones are narrow, the shocks can be much wider angle.</jats:p>

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