Braneworld wormholes supported by astrophysical observations
  In this study, we investigate the characteristics and properties of a
traversable wormhole constrained by the current astrophysical observations in
the framework of modified theories of gravity (MOG). As a concrete case, we
study traversable wormhole space--time configurations in the
Dvali--Gabadadze--Porrati (DGP) braneworld scenario, which are supported by the
effects of the gravity leakage of extra dimensions. We find that the wormhole
space--time structure will open in terms of the $2\sigma$ confidence level when
we utilize the joint constraints supernovae (SNe) Ia + observational Hubble
parameter data (OHD) + Planck + gravitational wave (GW) and $z<0.2874$.
Furthermore, we obtain several model-independent conclusions, such as (i) the
exotic matter threading the wormholes can be divided into four classes during
the evolutionary processes of the universe based on various energy conditions;
(ii) we can offer a strict restriction to the local wormhole space--time
structure by using the current astrophysical observations; and (iii) we can
clearly identify a physical gravitational resource for the wormholes supported
by astrophysical observations, namely the dark energy components of the
universe or equivalent space--time curvature effects from MOG. Moreover, we
find that the strong energy condition is always violated at low redshifts.
