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Density diagnostics of photoionized outflows in active galactic nuclei

Published online by Cambridge University Press:  12 October 2020

Junjie Mao Open the ORCID record for Junjie Mao [Opens in a new window]
Junjie Mao*
Affiliation:
Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK email: junjie.mao@strath.ac.uk SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, the Netherlands
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Abstract

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Photoionized outflows in active galactic nuclei (AGNs) are thought to influence their circumnuclear and host galactic environment. However, the distance of the outflow with respect to the black hole is poorly constrained, which limits our understanding of the kinetic power by the outflow. Therefore, the impact of AGN outflows on their host galaxies is uncertain. If the density of the outflow is known, its distance can be derived. Density measurement via variability studies and density sensitive lines have been used, albeit not very effective in the X-ray band. Good measurements are rather demanding or challenging for the current generation of (grating) spectrometers. The next generation of spectrometers will certainly provide data with better quality and large quantity, leading to tight constraints on the location and the kinetic power of AGN outflows. This contribution summarizes the state-of-the-art in this field.

Keywords

atomic dataatomic processesplasmastechniques:spectroscopicgalaxies: activegalaxies: Seyfert
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 274 - 277
Copyright
© International Astronomical Union 2020

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