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Alfvén Waves in Dusty Proto-Stellar Accretion Disks

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Multi-scale Dynamical Processes in Space and Astrophysical Plasmas

Part of the book series: Astrophysics and Space Science Proceedings ((ASSSP,volume 33))

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Abstract

The magneto-rotational instability (MRI) is believed to be the mechanism responsible for a magneto-hydrodynamic (MHD) turbulence that could lead to the accretion observed in proto-stellar accretion disks. A minimum amount of ionization in this medium is necessary for the MRI to take place. In this work we study the role of MHD waves as an additional source of heating in disks. As dust is present in this medium, we suggest that the Alfvén waves are damped by the dust-cyclotron mechanism of damping. We present a disk model with two heating mechanisms: the “anomalous” viscosity considered in terms of the α-parameterization and the damping of Alfvén waves. We show that the waves can increase the temperature of the disk and can reduce the quiescent region.

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Acknowledgements

The authors would like to thank the Brazilian agencies FAPESP (under grant 04/13846-6) and CNPq (under grant 304184/2010-1) for financial support.

Author information

Authors and Affiliations

  1. SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY169SS, UK

    Aline de Almeida Vidotto

  2. Institute of Astronomy, Geophysics and Atmosferic Sciences, University of São Paulo, Rua do Matão 1226, São Paulo, SP, 05508-090, Brazil

    Vera Jatenco-Pereira

Authors
  1. Aline de Almeida Vidotto
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  2. Vera Jatenco-Pereira
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Corresponding author

Correspondence to Aline de Almeida Vidotto .

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Editors and Affiliations

  1. , Inst. of Astro- and Particle Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, 6020, Austria

    Manfred P. Leubner

  2. , Inst. of Astro- and Particle Physics, University of Innsbruck, Technikerstr. 25, Innsbruck, 6020, Austria

    Zoltán Vörös

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© 2012 Springer-Verlag Berlin Heidelberg

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de Almeida Vidotto, A., Jatenco-Pereira, V. (2012). Alfvén Waves in Dusty Proto-Stellar Accretion Disks. In: Leubner, M., Vörös, Z. (eds) Multi-scale Dynamical Processes in Space and Astrophysical Plasmas. Astrophysics and Space Science Proceedings, vol 33. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30442-2_10

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  • DOI: https://doi.org/10.1007/978-3-642-30442-2_10

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30441-5

  • Online ISBN: 978-3-642-30442-2

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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