High-energy monitoring of NGC 4593 II. Broad-band spectral analysis: testing the two-corona model

Journal
Date Issued
2019
Author(s)
Middei, R.
•
BIANCHI, STEFANO
•
Petrucci, P. -O.
•
•
•
De Marco, B.
•
•
Malzac, J.
•
Marinucci, A.
•
Matt, G.
•
•
DOI
Abstract
It is widely believed that the primary X-ray emission of AGN is due to the Comptonization of optical-UV photons from a hot electron corona, while the origin of the `soft-excess' is still uncertain and matter of debate. A second Comptonization component, called warm corona, was therefore proposed to account for the soft-excess, and found in agreement with the optical-UV to X-ray emission of a sample of Seyfert galaxies. In this context, we exploit the broad-band XMM-Newton and NuSTAR simultaneous observations of the Seyfert galaxy NGC 4593 to further test the so-called `two corona model'. The NGC 4593 spectra are well reproduced by the model, from the optical/UV to the hard X-rays. Moreover, the data reveal a significant correlation between the hot and the warm corona parameters during our monitoring campaign.
Volume
483
Issue
4
Start page
4695
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2019MNRAS.483.4695M
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open.access
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