Volume 451, Number 3, June I 2006
|Page(s)||851 - 858|
|Published online||04 May 2006|
The emission spectrum of the strong Fe II emitter BAL Seyfert 1 galaxy IRAS 07598+6508
Observatoire de Haute Provence, CNRS, 04870 Saint-Michel l'Observatoire, France e-mail: [mira.veron;philippe.veron]@oamp.fr
2 Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon, France e-mail: Monique.Joly@obspm.fr
3 National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719, USA e-mail: email@example.com
4 Cordoba observatory and CONICET, Laprida 854, 5000 Cordoba, Argentina e-mail: firstname.lastname@example.org
5 Spitzer Science Center, California Institute of Technology, MS 220-6, Pasadena, CA 91125, USA e-mail: email@example.com
Accepted: 3 February 2006
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 ( 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.
Key words: galaxies: Seyfert / galaxies: individual: IRAS 07598+6508
© ESO, 2006
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