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Presentation . 2019
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Presentation . 2019
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The molecular torus of NGC1068

Authors: Impellizzeri, Violette;

The molecular torus of NGC1068

Abstract

I will present results obtained with ALMA on the prototypical Seyfert 2 nucleus in NGC 1068. Previous CO (6-5) observation already showed evidence for a high-velocity outflow at a resolution of ∼ 0.04" resolution. We have now obtained data with a factor ∼ 2 better resolution (∼1 pc-scale) with the most extended ALMA configurations. We observed HCN J=3-2 to reveal aline profile against the radio nucleus which is consistent with the outflow observed in CO. The projected radial velocity of this molecular outflow is ∼170 km/s with high velocity wings ranging up to 400 km/s. The nuclear spectrum also shows a narrow, redshifted absorption component at infall speed ∼40 km/s. Analysis of the position-velocity diagram and the morphology of the integrated line flux map reveals two nested, rotating disk components. The inner disk, inside ∼ 1.5 pc, has kinematics consistent with the edge-on, geometrically thin H2O water megamaser disk. The outer disk, which extends to 7 pc, is also geometrically thin but inclined. The outer disk counter-rotates relative to the inner, water megamaser disk. I will conclude with a picture in which the torus consists of two geometrically thin, counter-rotating disks, and the nuclear obscuration occurs in outflowing molecular clouds whose origin is likely a hydromagnetic wind driven off of the inner disk.

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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