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Multiwavelength analysis of OH Megamaser galaxies: The case of IRAS11506-3851

Published online by Cambridge University Press:  29 March 2021

Carpes P. Hekatelyne Open the ORCID record for Carpes P. Hekatelyne [Opens in a new window]  and
Thaisa Storchi-Bergmann
Carpes P. Hekatelyne
Affiliation:
Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil email: [email protected]
Thaisa Storchi-Bergmann
Affiliation:
Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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We present Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Hubble Space Telescope (HST) and Very Large Array (VLA) observations of the inner kpc of the OH Megamaser galaxy IRAS 11506-3851. In this work we discuss the kinematics and excitation of the gas as well as its radio emission. The HST images reveal an isolated spiral galaxy and the combination with the GMOS-IFU flux distributions allowed us to identify a partial ring of star-forming regions surrounding the nucleus with a radius of ≍500 pc. The emission-line ratios and excitation map reveal that the region inside the ring present mixed/transition excitation between those of Starbursts and Active Galactic Nuclei (AGN), while regions along the ring are excited by Starbursts. We suggest that we are probing a buried or fading AGN that could be both exciting the gas and originating an outflow.

Keywords

masersgalaxies: activegalaxies: interactionsgalaxies: ULIRGs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 347 - 349
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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