Miss Carolina Andonie Bahamondes carolina.p.andonie@durham.ac.uk
Early Stage Researcher (Marie Curie)
A multiwavelength-motivated X-ray model for the Circinus Galaxy
Andonie, Carolina; Ricci, Claudio; Paltani, Stéphane; Arévalo, Patricia; Treister, Ezequiel; Bauer, Franz; Stalevski, Marko
Authors
Claudio Ricci
Stéphane Paltani
Patricia Arévalo
Ezequiel Treister
Franz Bauer
Marko Stalevski
Abstract
Reprocessed X-ray emission in active galactic nuclei can provide fundamental information about the circumnuclear environments of supermassive black holes. Recent mid-infrared studies have shown evidence of an extended dusty structure perpendicular to the torus plane. In this work, we build a self-consistent X-ray model for the Circinus Galaxy including the different physical components observed at different wavelengths and needed to reproduce both the morphological and spectral properties of this object in the mid-infrared. The model consists of four components: the accretion disc, the broad-line region (BLR), a flared disc in the equatorial plane, and a hollow cone in the polar direction. Our final model reproduces well the 3–70 keV Chandra and NuSTAR spectra of Circinus, including the complex Fe Kα zone and the spectral curvature, although several additional Gaussian lines, associated with either ionized iron or broadened Fe Kα/Kβ lines, are needed. We find that the flared disc is Compton-thick (NH,d = 1.01+0.03 −0.24 × 1025 cm−2) and geometrically thick (CF = 0.55+0.01 −0.05), and that the hollow cone has a Compton-thin column density (NH,c = 2.18+0.47 −0.43 × 1023 cm−2), which is consistent with the values inferred by mid-infrared studies. Including also the BLR, the effective line-of-sight column density is NH = 1.47+0.03 −0.24 × 1025 cm−2. This approach to X-ray modelling, i.e. including all the different reprocessing structures, will be very important to fully exploit data from future X-ray missions.
Citation
Andonie, C., Ricci, C., Paltani, S., Arévalo, P., Treister, E., Bauer, F., & Stalevski, M. (2022). A multiwavelength-motivated X-ray model for the Circinus Galaxy. Monthly Notices of the Royal Astronomical Society, 511(4), 5768-5781. https://doi.org/10.1093/mnras/stac403
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 10, 2022 |
Online Publication Date | Feb 16, 2022 |
Publication Date | 2022-04 |
Deposit Date | May 27, 2022 |
Publicly Available Date | Mar 28, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 511 |
Issue | 4 |
Pages | 5768-5781 |
DOI | https://doi.org/10.1093/mnras/stac403 |
Public URL | https://durham-repository.worktribe.com/output/1204373 |
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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2022 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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