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The emission spectrum of the strong Fe II emitter BAL Seyfert 1 galaxy IRAS 07598+6508

Abstract : The narrow-line Seyfert 1 galaxy IRAS 07598+6508 is known to be a stong Fe II emitter. The analysis of several high S/N ratio spectra shows that its spectrum is dominated by a relatively narrow "broad line" region (1780 km s-1 FWHM) emitting not only Fe II, but also Ti II and Cr II lines. Although we were unable to find a completely satisfactory physical model, we got the best agreement with the observations with collisional rather than radiative models, with a high density (n=1015 cm-3), a high column density (NH = 1025 cm-2) and a microturbulence of 100 km s-1. This BLR is qualitatively similar to the one observed in I Zw 1. We have not found traces in IRAS 07598+6508 of the narrow line regions found in I Zw 1.
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https://hal.archives-ouvertes.fr/hal-03786177
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Submitted on : Sunday, October 2, 2022 - 8:41:19 AM
Last modification on : Monday, October 3, 2022 - 3:01:35 AM

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M.-P. Véron-Cetty, Monique Joly, P. Véron, T. Boroson, S. Lipari, et al.. The emission spectrum of the strong Fe II emitter BAL Seyfert 1 galaxy IRAS 07598+6508. Astronomy and Astrophysics - A&A, 2006, 451, pp.851-858. ⟨10.1051/0004-6361:20054237⟩. ⟨hal-03786177⟩

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