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.

Middei, R., Bianchi, S., Petrucci, P.-., Ursini, F., Cappi, M., De Marco, B., et al. (2019). High-energy monitoring of NGC 4593 II. Broad-band spectral analysis: Testing the two-corona model. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 483(4), 4695-4705 [10.1093/mnras/sty3379].

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

Middei, R.;Bianchi, S.;Ursini, F.;De Rosa, A.;Marinucci, A.;Matt, G.;Tortosa, A.
2019-01-01

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.
Middei, R., Bianchi, S., Petrucci, P.-., Ursini, F., Cappi, M., De Marco, B., et al. (2019). High-energy monitoring of NGC 4593 II. Broad-band spectral analysis: Testing the two-corona model. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 483(4), 4695-4705 [10.1093/mnras/sty3379].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/350123
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