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1 results

  • Correlation space of narrow-line Seyfert 1 galaxies

  • D. W. Xu, S. Komossa
  • Journal:
    Proceedings of the International Astronomical Union / Volume 8 / Issue S290 / August 2012
    Published online by Cambridge University Press:
    21 February 2013, pp. 349-350
    Print publication:
    August 2012
    • Article
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  • Narrow-line Seyfert 1 (NLS1) galaxies, as active galactic nuclei with low-mass black holes and high accretion rates, are important targets when addressing questions related to black hole growth and accretion physics. We have studied the correlations among the optical emission-line and continuum properties of a sample of NLS1 galaxies, in comparison with a sample of broad-line Seyfert 1 galaxies. We have shown that the density of the narrow-line region is a key component of Eigenvector 1 space. Density turned out to be as important as the Eddington ratio L/LEdd. This result therefore establishes a close link between central engine and host properties, and places new constraints on host - black hole co-evolution.