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Monte Carlo simulations of dusty gas discs around supermassive black holes

  • Maarten Baes (a1) and Sławomir Piasecki (a1) (a2)

Abstract

Using detailed Monte Carlo radiative transfer simulations in realistic models for galactic nuclei, we critically investigate the influence of interstellar dust in ionised gas discs on the rotation curves and the resulting black hole mass measurements. We find that absorption and scattering by interstellar dust leaves the shape of the rotation curves basically unaltered, but slightly decreases the central slope of the rotation curves. As a result, the “observed” black hole masses are systematically underestimated by some 10 to 20% for realistic optical depths.

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References

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Atkinson, J. W., Collett, J. L., Marconi, A. et al. 2005, MNRAS, 359, 504
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