Astronomy & Astrophysics manuscript no. 36398corrcopy c ESO 2019 October 22, 2019 Kinematic signatures of reverberation mapping of close binaries of supermassive black holes in active galactic nuclei III. The case of elliptical orbits Andjelka B. Kovaceviˇ c´1, Jian-Min Wang2, Luka C.ˇ Popovic´3 1 Department of astronomy, Faculty of mathematics, University of Belgrade Studentski trg 16, Belgrade, 11000, Serbia e-mail:
[email protected] 2 Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, CAS, 19B Yuquan Road, Beijing 100049, China e-mail:
[email protected] 3 Astronomical observatory Belgrade Volgina 7, P.O.Box 74 11060, Belgrade, 11060, Serbia e-mail:
[email protected] Received , ; accepted , ABSTRACT Context. An unresolved region in the relative vicinity of the event horizon of a supermassive black holes (SMBH) in active galactic nuclei (AGN) radiates strongly variable optical continuum and broad-line emission flux. These fluxes can be processed into two- dimensional transfer functions (2DTF) of material flows that encrypt various information about these unresolved structures. An intense search for kinematic signatures of reverberation mapping of close binary SMBH (SMBBH) is currently ongoing. Aims. Elliptical SMBBH systems (i.e. both orbits and disc-like broad-line regions (BLR) are elliptic) have not been assessed in 2DTF studies. We aim to numerically infer such a 2DTF because the geometry of the unresolved region is imprinted on their optical emission. Through this, we determine their specific kinematical signatures. Methods. We simulated the geometry and kinematics of SMBBH whose components are on elliptical orbits. Each SMBH had a disc-like elliptical BLR.