Kavli Affiliate: Norbert Schulz
| First 5 Authors: Ioanna Psaradaki, Missagh Mehdipour, Daniele Rogantini, Elisa Costantini, Norbert Schulz
| Summary:
Cosmic dust plays a crucial role in the evolution of galaxies, significantly
influencing star formation and the interstellar medium. However, in active
galactic nuclei (AGN), the role and origin of dust remain poorly understood.
High-resolution X-ray spectroscopy is a powerful tool for probing the
properties of dust in AGN. NGC 6860, an X-ray bright type-1 quasar, is an ideal
target for investigating the connection between dust and winds in AGN. It
exhibits reddening and X-ray absorption by both dust and winds. By modeling
high-resolution X-ray spectra from XMM-Newton and Chandra observations, we
determine the properties of dust and outflows in this AGN. Our analysis finds
four photoionized components, outflowing with velocities of 50-300 km/s. The
first two are relatively highly ionized with logxi = 3.4 and logxi = 2.9. The
results of our photoionization modeling suggest that these two components are
thermally unstable. The third component is ionized, with logxi = 2.3 and is
located further away from the central black hole. The fourth component is less
ionized, and is possibly located in the host galaxy. The application of dust
models enables us to probe the abundance and location of the dust in NGC 6860.
Our findings suggest that dust absorption and reddening originates from the
extended narrow-line region and its host galaxy.
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