Fig. 7.

The physical regime on the mass-circumferential equatorial radius plane for neutron star solutions in EdGB theory for the FPS (left) and DI-II (right) EOSs. The left boundary in each panel designates the static sequence and the upper and right boundary the mass-shedding sequence. The values of the coupling constant $\mathit{\alpha }=0,1,2$ are in units of $M_{\odot }^2$. (Image reproduced with permission from Kleihaus et al. 2016, copyright by APS)