Persistent URL of this record https://hdl.handle.net/1887/43417
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Winds in the AGN environment : new perspectives from high resolution X-ray spectroscopy
ingredient in the AGN picture. Outflows of photoionized gas,
which produce blueshifted absorption features
detectable in the X-ray and in the UV band,
are present in about 50% of Seyfert 1 galaxies.
Combining observations at high spectral
resolution with photoionization modeling
techniques, the kinetics, and the ionization conditions
of the outflowing gas can be diagnosed with high accuracy.
In this thesis, we applied these methods
to three cases of study, obtaining a variety of results.
In the X-ray spectrum of the
Seyfert 1 galaxy 1H 0419-577,
we detected the absorption lines from
a galactic scale outflow already observed in the UV.
In the case of the prototypical type 1 AGN NGC 5548,
we discovered a lowly-ionized, patchy wind located
in the nuclear region. We show that
the emergence of this obscuring wind
have...Show more In recent years, winds were recognized as an important
ingredient in the AGN picture. Outflows of photoionized gas,
which produce blueshifted absorption features
detectable in the X-ray and in the UV band,
are present in about 50% of Seyfert 1 galaxies.
Combining observations at high spectral
resolution with photoionization modeling
techniques, the kinetics, and the ionization conditions
of the outflowing gas can be diagnosed with high accuracy.
In this thesis, we applied these methods
to three cases of study, obtaining a variety of results.
In the X-ray spectrum of the
Seyfert 1 galaxy 1H 0419-577,
we detected the absorption lines from
a galactic scale outflow already observed in the UV.
In the case of the prototypical type 1 AGN NGC 5548,
we discovered a lowly-ionized, patchy wind located
in the nuclear region. We show that
the emergence of this obscuring wind
have drastically changed the
spectral appearance of the source
in the soft X-ray and in the UV band.
Finally, we characterized
a photoionized gas outflow in 4C +74.26,
which is one of the few radio-loud AGN in which
signatures of photoionized gas could be detected.Show less
- All authors
- Di Gesu, L.
- Supervisor
- Kaastra, J.S.
- Co-supervisor
- Costantini, E.
- Committee
- Cappi, M.; Jaffe, W.J.; Morganti, R.; Röttgering, H.J.A.; Werf, P. van der
- Qualification
- Doctor (dr.)
- Awarding Institution
- Leiden Observatory , Science , Leiden University
- Date
- 2016-10-04