High-energy monitoring of NGC 4593 II. Broad-band spectral analysis: testing the two-corona model - IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (<b>anciennement Cemagref</b>) Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2019

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

R. Middei
  • Function : Author
S. Bianchi
F. Ursini
  • Function : Author
M. Cappi
  • Function : Author
B. de Marco
  • Function : Author
A. de Rosa
  • Function : Author
A. Marinucci
  • Function : Author
G. Matt
  • Function : Author
G. Ponti
  • Function : Author
A. Tortosa
  • Function : Author

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.
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hal-01974746 , version 1 (01-06-2023)

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R. Middei, S. Bianchi, P.-O. Petrucci, F. Ursini, M. Cappi, et al.. High-energy monitoring of NGC 4593 II. Broad-band spectral analysis: testing the two-corona model. Monthly Notices of the Royal Astronomical Society, 2019, 483 (4), pp.4695-4705. ⟨10.1093/mnras/sty3379⟩. ⟨hal-01974746⟩
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