A 6.4yr optical quasi-periodic oscillations detected in the quasar of SDSS J075217.84+193542.2
A 6.4yr optical quasi-periodic oscillations in SDSS J075217.84+193542.2: a new candidate for central binary black hole system
In this manuscript, a 6.4yr optical quasi-periodic oscillations (qpos) is reported in the quasar sdss j075217.84+193542.2 (=\obj) at a redshift 0.117, of which 13.6yr-long light curve from css and asas-sn directly described by a sinusoidal function with a periodicity 6.4yr.The 6.4yr optical quasi-periodic oscillations can be further confirmed through the generalized lomb-scargle periodogram with confidence level higher than 99.99\%, and through the auto-correlation analysis results, and through the wwz technique.The optical quasi-periodic oscillations strongly indicate a central binary black hole (bbh) system in \obj.
