Linear spectropolarimetric analysis of fairall 9 with VLT/FORS2

Journal
Date Issued
2021
Author(s)
Jiang, Bo-Wei
•
•
Savić, Đorđe
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Shablovinskaya, Elena
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Popović, Luka Č.
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Afanasiev, Victor L.
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Czerny, Bożena
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Wang, Jian-Min
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del Olmo, Ascensión
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D'ONOFRIO, MAURO
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Śniegowska, Marzena
•
•
Panda, Swayamtrupta
DOI
Abstract
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.
Volume
508
Issue
1
Start page
79
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2021MNRAS.508...79J
Rights
open.access
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