Periodic Orbits Around Kerr Sen Black Holes*

Chang-Qing Liu,Chi-Kun Ding,Ji-Liang Jing

Fig. 7 (Color online) The variation of $q$ as a function of energy $E$ and angular momentum $L$ for different values of $b$ in non-rotating KSBH: decreasing from left to right the values are $1, 0.8, 0.6, 0.4, 0.2$, and $0$. In (a), for each $b$ depicted above, the corresponding angular momentum is $L_\mathrm{av}=(L_{\rm IBCO}+L_{\rm ISCO})/2$ . In (b), energy is kept fixed when $(z,w,v)=(2,1,1)$.