line: profiles; techniques: polarimetric; quasars: emission lines; quasars: individual: Fairall 9; quasars: supermassive black holes; Astrophysics - Astrophysics of Galaxies
Abstract :
[en] The quasar main sequence appears to be an incredibly powerful tool to organize the diversity in large samples of type-1 quasars but the most important physical parameters governing it are still unclear. Here, we investigate the origin of the broadening and of a defining feature of Population B sources: a strong redward asymmetry of the Balmer emission lines. We focus on a prototypical source, Fairall 9. Spectropolarimetric data of the Fairall 9 broad H β and H α profiles allowed for a view of the geometric and dynamical complexity of the line emitting regions. Measurements (1) provided evidence of rotational motion; (2) were helpful to test the presence of polar and equatorial scatterers, and their association with non-virial motions. However, we suggest that the polarization properties appear to be more consistent with a warped disc geometry induced by Lense-Thirring precession.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Jiang, Bo-Wei; CAS, Institute of High Energy Physics, Beijing, University of the Chinese Academy of Sciences, Beijing
Marziani, Paola; Astronomical Observatory of Padua
Savic, Djordje ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Space sciences, Technologies and Astrophysics Research (STAR) ; Astronomical Observatory of Belgrade, Serbia
Shablovinskaya, Elena; SAO, Special Astrophysical Observatory, Moscow
Popović, Luka Č.; Astronomical Observatory of Belgrade, Serbia, University of Belgrade, Department of Astronomy
Afanasiev, Victor L.; SAO, Special Astrophysical Observatory, Moscow
Czerny, Bożena; Polish Academy of Sciences, Institute of Physics
Wang, Jian-Min; CAS, Institute of High Energy Physics, Beijing, University of the Chinese Academy of Sciences, Beijing, CAS, National Astronomical Observatories
del Olmo, Ascensión; Glorieta de la Astronomia s/n, Instituto de Astrofisíca de Andalucía, IAA-CSIC, E-18008 Granada, Spain
D'Onofrio, Mauro; University of Padua, Department of Physics and Astronomy
Śniegowska, Marzena; Polish Academy of Sciences, Institute of Physics, Nicolaus Copernicus Astronomical Center, Warsaw
Mazzei, Paola; Astronomical Observatory of Padua
Panda, Swayamtrupta; Polish Academy of Sciences, Institute of Physics, Nicolaus Copernicus Astronomical Center, Warsaw
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