Supermassive Black Hole Winds in X-rays: SUBWAYS. I. Ultra-fast outflows in quasars beyond the local Universe
Journal
Date Issued
2023
Author(s)
Matzeu, G. A.
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Brusa, M.
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BIANCHI, Simone
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Kriss, G.
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Mehdipour, M.
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Chartas, G.
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Middei, R.
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Gianolli, V.
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Longinotti, A. L.
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Krongold, Y.
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Ricci, F.
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Petrucci, P. O.
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Miniutti, G.
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Behar, E.
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Mathur, S.
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Perna, M.
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Giustini, M.
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Vignali, C.
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•
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Costantini, E.
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De Marco, B.
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Guainazzi, M.
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Kaastra, J.
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Kraemer, S.
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La Franca, F.
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Proga, D.
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Baldini, P.
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King, A. R.
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Maiolino, R.
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Matt, G.
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Merloni, A.
Abstract
We present a new X-ray spectroscopic study of 22 luminous (2 × 1045 ≲ Lbol/erg s−1 ≲ 2 × 1046) active galactic nuclei (AGNs) at intermediate redshifts (0.1 ≲ z ≲ 0.4), as part of the SUpermassive Black hole Winds in the x-rAYS (SUBWAYS) sample, mostly composed of quasars and type 1 AGNs. Here, 17 targets were observed with XMM-Newton in 2019-2020, and the remaining 5 are from previous observations. The aim of this large campaign (1.45 Ms duration) is to characterise the various manifestations of winds in the X-rays driven from supermassive black holes in AGNs. In this paper we focus on the search for and characterisation of ultra-fast outflows (UFOs), which are typically detected through blueshifted absorption troughs in the Fe K band (E > 7 keV). By following Monte Carlo procedures, we confirm the detection of absorption lines corresponding to highly ionised iron (e.g. Fe XXV Hα and Fe XXVI Lyα) in 7 out of 22 sources at the ≳95% confidence level (for each individual line). The global combined probability of such absorption features in the sample is > 99.9%. The SUBWAYS campaign, based on XMM-Newton, extends to higher luminosities and redshifts than previous local studies on Seyferts. We find a UFO detection fraction of ∼30% of the total sample, which is in agreement with previous findings. This work independently provides further support for the existence of highly ionised matter propagating at mildly relativistic speeds (≳0.1c) in a considerable fraction of AGNs over a broad range of luminosities, which is believed to play a key role in the self-regulated AGN feeding-feedback cycle, as also supported by hydrodynamical multi-phase simulations.
Volume
670
Start page
A182
Issn Identifier
0004-6361
Ads BibCode
2023A&A...670A.182M
Rights
open.access
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