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Searching for outflows in X-ray weak quasars

Published online by Cambridge University Press:  28 October 2024

Bartolomeo Trefoloni Open the ORCID record for Bartolomeo Trefoloni [Opens in a new window]
Bartolomeo Trefoloni*
Affiliation:
Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, 50019 Sesto Fiorentino, Firenze, Italy INAF – Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, I-50125 Firenze, Italy
*
email: bartolomeo.trefoloni@unifi.it
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Abstract

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The connection between X-ray weakness and powerful X-ray outflows is both expected in a scenario where outflows are connected with radiation-driven winds, and observed in several sources, both in the local Universe and at high redshift. Here I present the first results of a new study of this possible connection based on a search for SDSS quasars with weak X-ray emission in serendipitous XMM-Newton observations. The selected objects have a “normal” optical/UV blue continuum, but a flat and extraordinarily weak X-ray spectrum. The availability of rest-frame optical/UV spectra allows to check for the signature of outflows in the absorption lines and/or in the profiles of the emission lines. This method could reveal the presence of a population of so-far overlooked outflowing quasars and confirm the connection between winds and X-ray weakness in quasars.

Keywords

quasarAGNoutflowsX-rayssuper-massive black hole
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S378: Black Hole Winds at All Scales , December 2023 , pp. 39 - 44
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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