SIMBAD references

2019ApJ...886...55L - Astrophys. J., 886, 55-55 (2019/November-3)

Parsec-scale dusty winds in active galactic nuclei: evidence for radiation pressure driving.

LEFTLEY J.H., HONIG S.F., ASMUS D., TRISTRAM K.R.W., GANDHI P., KISHIMOTO M., VENANZI M. and WILLIAMSON D.J.

Abstract (from CDS):

Infrared interferometry of the local active galactic nucleus (AGN) has revealed a warm (∼300-400 K) polar dust structure that cannot be trivially explained by the putative dust torus of the unified model. This led to the development of the disk+wind scenario which comprises a hot (∼1000 K) compact equatorial dust disk and a polar dust wind. This wind is assumed to be driven by radiation pressure and, therefore, we would expect that long-term variation in radiation pressure would influence the dust distribution. In this paper we attempt to quantify if and how the dust distribution changes with radiation pressure. We analyze so far unpublished Very Large Telescope Interferometer (VLTI)/MID-infrared Interferometer (MIDI) data on 8 AGN and use previous results on 25 more to create a sample of 33 AGN. This sample comprises all AGN successfully observed with VLTI/MIDI. For each AGN, we calculate the Eddington ratio, using the intrinsic 2-10 keV X-ray luminosity and black hole mass, and compare this to the resolved dust emission fraction as seen by MIDI. We tentatively conclude that there is more dust in the wind at higher Eddington ratios, at least in type 2 AGN where such an effect is expected to be more easily visible.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Active galactic nuclei - Long baseline interferometry - Interferometry - Dust continuum emission

Simbad objects: 35

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2019ApJ...886...55L and select 'bookmark this link' or equivalent in the popup menu


2020.09.23-12:54:55

© Université de Strasbourg/CNRS

    • Contact