Gespeichert in:
| 1. Verfasser: | |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Schlagworte: | |
| Online-Zugang: | https://arxiv.org/abs/2504.05531 |
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Inhaltsangabe:
- Broad emission line regions (BLRs) lying into central accretion disks has been widely accepted to explain the unique double-peaked broad emission lines in Active Galactic Nuclei (double-peaked BLAGNs). Here, accepted the accretion disk origin, periodic variations of central wavelength $λ_{0}$ (the first moment) and line width $σ$ (the second moment) of double-peaked broad emission lines are theoretically simulated and determined. Furthermore, through theoretically simulated periodicities of $T_{\lambda0}$ and $T_σ$ for variations of $λ_0$ and $σ$, periodicity ratio $R_{fs}$ of $T_{\lambda0}$ to $T_σ$ to be around 2 can be applied to support the spiral arms to be more preferred in BLRs lying into central accretion disks. Then, periodic variations of $λ_0$ and $σ$ are determined and shown in the known double-peaked BLAGN NGC1097, leading to the parameter $R_{fs}\sim2$, which can be applied as clues to support that the structure of spiral arms in disk-like BLRs in central accretion disk should be the most compelling interpretation to the variability of double-peaked broad H$α$ in NGC1097. The results provide clean criteria to test accretion disk origins of double-peaked broad emission lines in AGN.