X-ray spectral analysis of the low-luminosity active galactic nucleus NGC 7213 using long XMM-Newton observations
X-ray spectral analysis of the low-luminosity active galactic nucleus NGC 7213 using long XMM-Newton observations
We present the X-ray spectral results from the longest X-ray Multi-mirror Mission–Newton observation, 133 ks, of the low-luminosity active galactic nucleus NGC 7213. The hardness-ratio analysis of the X-ray light curves discloses a rather constant X-ray spectral shape, at least for the observed exposure time, enabling us to perform X-ray spectral studies using the total observed spectrum. Apart from a neutral Fe Kα emission line, we also detect narrow emission lines from the ionized iron species, Fe xxv and Fe xxvi. Our analysis suggests that the neutral Fe Kα originates from a Compton-thin reflector, while the gas responsible for the high-ionization lines is collisionally excited. The overall spectrum, in the 0.3–10 keV energy band, registered by the European Photon Imaging Camera can be modelled by a power-law component (with a slope of Γ ≅ 1.9) plus two thermal components at 0.36 and 8.84 keV. The low-energy thermal component is entirely consistent with the X-ray spectral data obtained by the Reflection Grating Spectrometer between 0.35–1.8 keV.
3439-3448
Emmanoulopoulos, D.
ee2db4c6-3379-4604-8711-f779fb74f538
Papadakis, I.E.
81a6785c-8f4d-49a3-9eac-23ee4c743563
Nicastro, F.
46081f33-7d1f-46b4-8577-b996e99963fe
Mchardy, I.
4f215137-9cc4-4a08-982e-772a0b24c17e
11 March 2013
Emmanoulopoulos, D.
ee2db4c6-3379-4604-8711-f779fb74f538
Papadakis, I.E.
81a6785c-8f4d-49a3-9eac-23ee4c743563
Nicastro, F.
46081f33-7d1f-46b4-8577-b996e99963fe
Mchardy, I.
4f215137-9cc4-4a08-982e-772a0b24c17e
Emmanoulopoulos, D., Papadakis, I.E., Nicastro, F. and Mchardy, I.
(2013)
X-ray spectral analysis of the low-luminosity active galactic nucleus NGC 7213 using long XMM-Newton observations.
Monthly Notices of the Royal Astronomical Society, 429 (4), .
(doi:10.1093/mnras/sts610).
Abstract
We present the X-ray spectral results from the longest X-ray Multi-mirror Mission–Newton observation, 133 ks, of the low-luminosity active galactic nucleus NGC 7213. The hardness-ratio analysis of the X-ray light curves discloses a rather constant X-ray spectral shape, at least for the observed exposure time, enabling us to perform X-ray spectral studies using the total observed spectrum. Apart from a neutral Fe Kα emission line, we also detect narrow emission lines from the ionized iron species, Fe xxv and Fe xxvi. Our analysis suggests that the neutral Fe Kα originates from a Compton-thin reflector, while the gas responsible for the high-ionization lines is collisionally excited. The overall spectrum, in the 0.3–10 keV energy band, registered by the European Photon Imaging Camera can be modelled by a power-law component (with a slope of Γ ≅ 1.9) plus two thermal components at 0.36 and 8.84 keV. The low-energy thermal component is entirely consistent with the X-ray spectral data obtained by the Reflection Grating Spectrometer between 0.35–1.8 keV.
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Accepted/In Press date: 12 December 2012
e-pub ahead of print date: 14 January 2013
Published date: 11 March 2013
Organisations:
Astronomy Group
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Local EPrints ID: 401492
URI: http://eprints.soton.ac.uk/id/eprint/401492
ISSN: 1365-2966
PURE UUID: 060edcf7-d6bb-4756-a831-84cfb046a81b
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Date deposited: 18 Oct 2016 15:42
Last modified: 15 Mar 2024 02:48
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Author:
D. Emmanoulopoulos
Author:
I.E. Papadakis
Author:
F. Nicastro
Author:
I. Mchardy
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