Line shifts and sub-pc super-massive binary black holes

Abstract

Here we discuss the possibility of super-massive binary black hole (SMBBH) detection, using the shifts of the broad lines emitted from a binary system. We perform a number of simulations of shapes and shifts of $H_{\beta }$ lines emitted from SMBBHs, taking into account the emission from two different regions located around both black holes, and kinematical effects which should be present in a SMBBH. In the model we connect the parameters of the lines with the mass of black holes and find that the peak shift depends, not only on kinematical effects of system rotation and black hole mass ratio, but it is also a function of the individual masses of the two black holes (BHs).

10 pages 6 figures

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• Recoiling supermassive black hole in changing-look AGN Mrk 1018
• Emission Signatures from Sub-parsec Binary Supermassive Black Holes I: Diagnostic Power of Broad Emission Lines
• A Multi-wavelength Analysis of Binary-AGN Candidate PSO J334.2028+01.4075
• Detecting subparsec super-massive binary black holes: Long termmonitoring perspective
• Predicting the broad lines polarization emitted by supermassive binary black holes
• Detection of eccentric close-binary supermassive black holes with incomplete interferometric data