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The Influence of Cosmic Rays in the Circumnuclear Molecular Gas of NGC 1068

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Cosmic Rays in Star-Forming Environments

Part of the book series: Astrophysics and Space Science Proceedings ((ASSSP,volume 34))

Abstract

We surveyed the circumnuclear disk of the Seyfert galaxy NGC 1068 between the frequencies 86.2 and 115.6 GHz, and identified 17 different molecules. Using a time and depth dependent chemical model we reproduced the observational results, and show that the column densities of most of the species are better reproduced if the cold gas is heavily pervaded by a high cosmic ray ionization rate of about 1,000 times that of the Milky Way. We discuss how molecules in the NGC 1068 nucleus may be influenced by this external radiation, as well as by UV radiation fields.

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Notes

  1. 1.

    IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain).

  2. 2.

    CLASS http://www.iram.fr/IRAMFR/GILDAS

  3. 3.

    MASSA http://damir.iem.csic.es/mediawiki-1.12.0/index.php/MASSA_User’s_Manual

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Author information

Authors and Affiliations

  1. Department of Physics and Astronomy, UCL, Gower Street, London, WC1E 6BT, UK

    Rebeca Aladro & Serena Viti

  2. Sub-Department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK

    Estelle Bayet

  3. Instituto de Radioastronomía Milimétrica, Avda. Divina Pastora, 7, Local 20, E-18012, Granada, Spain

    Denise Riquelme

Authors
  1. Rebeca Aladro
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  2. Serena Viti
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  3. Estelle Bayet
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  4. Denise Riquelme
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Corresponding author

Correspondence to Rebeca Aladro .

Editor information

Editors and Affiliations

  1. , (IEEC-CSIC) Campus UAB, Fac. de Ciències, ICREA & Institute of Space Sciences, Torre C5, parell, 2a planta, Barcelona, 08193, Spain

    Diego F. Torres

  2. , Leopold-Franzens-Universität Innsbruck, Institut für Astro- und Teilchenphysik, Technikerstraße 25/8, Innsbruck, 6020, Austria

    Olaf Reimer

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Aladro, R., Viti, S., Bayet, E., Riquelme, D. (2013). The Influence of Cosmic Rays in the Circumnuclear Molecular Gas of NGC 1068. In: Torres, D., Reimer, O. (eds) Cosmic Rays in Star-Forming Environments. Astrophysics and Space Science Proceedings, vol 34. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35410-6_3

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  • DOI: https://doi.org/10.1007/978-3-642-35410-6_3

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-35409-0

  • Online ISBN: 978-3-642-35410-6

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