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Near-IR integral field spectroscopy of the NLR of ESO428-G14: the role of the radio jet

Published online by Cambridge University Press:  01 August 2006

Thaisa Storchi-Bergmann ,
Rogemar A. Riffel ,
Fausto K. B. Barbosa  and
Cláudia Winge
Thaisa Storchi-Bergmann
Affiliation:
Instituto de Física, UFRGS, CP 15051, Porto Alegre 91501-970, RS, Brazil email: thaisa@ufrgs.br, rogemar@ufrgs.br, faustokb@if.ufrgs.br
Rogemar A. Riffel
Affiliation:
Instituto de Física, UFRGS, CP 15051, Porto Alegre 91501-970, RS, Brazil email: thaisa@ufrgs.br, rogemar@ufrgs.br, faustokb@if.ufrgs.br
Fausto K. B. Barbosa
Affiliation:
Instituto de Física, UFRGS, CP 15051, Porto Alegre 91501-970, RS, Brazil email: thaisa@ufrgs.br, rogemar@ufrgs.br, faustokb@if.ufrgs.br
Cláudia Winge
Affiliation:
Gemini Observatory, c/o AURA Inc., Casilla 603, La Serena, Chile, email: cwinge@gemini.edu
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Abstract

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We present two-dimensional (2D) gas kinematics and excitation of the inner 300 pc of the Seyfert galaxy ESO428-G14 at a sampling of 14 pc2, from near-infrared spectroscopic observations at R=5900 obtained with the Integral Field Unit of the Gemini Near-Infrared Spectrograph. Blue-shifts of up to 400 km s−1 and velocity dispersions of up to 150 km s−1, are observed in association with the radio jet running from SE to NW along position angle 129°. Both X-rays emitted by the active galactic nucleus and shocks produced by the radio jet can excite the H2 and [Fe ii] emission lines. We use the 2D velocity dispersion maps we estimate upper limits of 90% to the contribution of the radio jet to the excitation of [Fe ii]λ1.257μm, and of 80% to the excitation of H2λ2.121μm in the jet region.

Keywords

Galaxies: individual (ESO 428-G14) – galaxiesactive – galaxies: nuclei – galaxies: ISM – galaxies: kinematics and dynamics – galaxies: jets
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 457 - 458
Copyright
Copyright © International Astronomical Union 2007

References

Falcke, H., Wilson, A. S. & Simpson, C. 1998, ApJ, 502, 199CrossRefGoogle Scholar
Riffel, R. A., Storchi-Bergmann, T., Winge, C. & Barbosa, F. K. B. 2006, MNRAS 373, 2CrossRefGoogle Scholar