SDSS J1130+0058 an X-shaped Radio Source With Double-Peaked Low-Ionization Emission Lines: A binary Black Hole System?

In this paper, we study the object SDSS J1130+0058 which is the only active galactic nuclei (AGN) known to have both double-peaked low-ionization broad emission lines and X-shaped radio structures. Emission from an accretion disc can reproduce the double-peaked line profile of broad Hα, but not the radio structure. Under the accretion disc model, the period of the inner emission-line region is abo...