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http://hdl.handle.net/20.500.12386/31145
Title: | The origin of X-ray emission in the gamma-ray emitting narrow-line Seyfert 1 1H 0323+342 | Authors: | Mundo, Sergio A. Kara, Erin Cackett, Edward M. Fabian, A. C. Jiang, J. Mushotzky, R. F. Parker, M. L. PINTO, CIRO Reynolds, C. S. Zoghbi, A. |
Issue Date: | 2020 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 496 | Issue: | 3 | First Page: | 2922 | Abstract: | We present the results of X-ray spectral and timing analyses of the closest gamma-ray emitting narrow-line Seyfert 1 (γ-NLS1) galaxy, 1H 0323+342. We use observations from a recent, simultaneous XMM-Newton/NuSTAR campaign. As in radio-quiet NLS1s, the spectrum reveals a soft excess at low energies (≲2 keV) and reflection features such as a broad iron K emission line. We also find evidence of a hard excess at energies above ∼35 keV that is likely a consequence of jet emission. Our analysis shows that relativistic reflection is statistically required, and using a combination of models that includes the reflection model relxill for the broad-band spectrum, we find an inclination of $I=63^{+7}_{-5}$ degrees, which is in tension with much lower values inferred by superluminal motion in radio observations. We also find a flat (q = 2.2 ± 0.3) emissivity profile, implying that there is more reflected flux than usual being emitted from the outer regions of the disc, which in turn suggests a deviation from the thin disc model assumption. We discuss possible reasons for this, such as reflection off of a thick accretion disc geometry. | URI: | http://hdl.handle.net/20.500.12386/31145 | URL: | https://academic.oup.com/mnras/article/496/3/2922/5859510 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/staa1744 | Bibcode ADS: | 2020MNRAS.496.2922M | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Mundo2020.pdf | PDF Editoriale | 1.08 MB | Adobe PDF | View/Open |
Mundo2020oa.pdf | Open Access arXiv | 880.83 kB | Adobe PDF | View/Open |
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