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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz

IMPACT FACTOR 2017 (Baltic Astronomy): 0.417
5-year IMPACT FACTOR (Baltic Astronomy): 0.486

CiteScore 2017: 0.16

SCImago Journal Rank (SJR) 2017: 0.131
Source Normalized Impact per Paper (SNIP) 2017: 0.109

ICV 2017: 121.03

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Volume 20, Issue 3


Variability of Double-Peaked Emission Lines in AGNs as a Probe of the Broad-Line Region Structure

Hélène M. L. G. Flohic
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0308


We demonstrate that the disk-wind model for the broad-line region (BLR) can explain the variability from single-peaked to double-peaked emission line (DPEL) profiles observed in some active galactic nuclei (AGNs) and can produce realistic single-peaked line profiles if the inclination and size of the line-emitting region are restricted. The main drivers of differences in the line profile is the radial density distribution in the wind, which is likely related to the accretion rate of the AGN. We exploit the extreme case of AGNs with DPELs in order to test different models of perturbations in the accretion disk, and find evidences that the outer regions of the disk are likely unstable to self-gravity. Finally, we devise a new monitoring strategy in order to build a rich dataset in a short time.

Keywords: galaxies; active quasars; emission lines


About the article

Received: 2011-08-08

Accepted: 2011-08-15

Published Online: 2017-03-23

Published in Print: 2011-09-01

Citation Information: Open Astronomy, Volume 20, Issue 3, Pages 386–391, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0308.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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