An Idealized Model for Dust Accretion in Active Galactic Nuclei

  • J. Buitrago
  • E. Mediavilla
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


With an adequate supply of matter, the inwards drifting of dust particles induced by the Poynting-Robertson effect can lead to the formation of a shell or disk-like structure around the source of radiation. In a steady state, the Poynting-Robertson effect produce a spatial density of dust going like l/r which in turn give rise to a mid-infrared spectrum Fν∝l/ν. We think that this short report could be of interest for the interpretation of the infrared excess found in many extragalactic sources.


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  1. Buitrago, J. and Mediavilla, E.: 1985, Astrophys.Space Sci. 109, 77ADSCrossRefMathSciNetGoogle Scholar
  2. Grijp, M.H.P., Milley, G.K., Lub, J. and Jong, T.: 1985, Nature Vol.314, 240ADSCrossRefGoogle Scholar
  3. Jaroszynski, M., Abramowicz, M.A., and Paczynski, B.: 1980, Acta Astronómica, Vol. 30, 1.ADSGoogle Scholar
  4. Leinert, C., Röser, S., and Buitrago, J.: 1983, Astron. Astrophys.118, 345ADSzbMATHGoogle Scholar
  5. Rees, M.J., Silk, J.I., Werner, N.W. and Wickramasinghe, N.C.: 1969, Nature, Vol. 223, 778.ADSCrossRefGoogle Scholar
  6. Robertson, H.P.: 1937, Monthly Notices Roy. Astron. Soc. 97, 423ADSzbMATHGoogle Scholar
  7. Shakura, N.I., and Sunyaev, R.A.: 1973, Astron. Astrophys. 24, 337ADSGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • J. Buitrago
    • 1
  • E. Mediavilla
    • 1
  1. 1.Instituto de Astrofísica de CanariasUniversity of La LagunaTenerifeSpain

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