https://doi.org/10.1140/epjc/s10052-020-08440-7
Regular Article - Theoretical Physics
Traversable wormholes in the bulge of Milky Way galaxy with Global Monopole Charge
1
Department of Mathematics, Jadavpur University, 700032, Kolkata, West Bengal, India
2
Department of Mathematics, Karimpur Pannadevi College, Karimpur, 741152, Nadia, West Bengal, India
Received:
15
June
2020
Accepted:
5
September
2020
Published online:
22
September
2020
The present work looks for the existence of completely new wormhole geometries in the bulge of the Milky Way galaxy (MWG) situated on the dark matter (DM) density profile followed from MacMillan (MNRAS 76:465, 2017) and Boshkayev and Malafarina (MNRAS 484:3325, 2019) concerned with Global Monopole Charge. The obtained shape function is positively increasing against the radial coordinate and it increases faster with the increasing values of Global Monopole Charge. Moreover, the reported shape function satisfies all the essential criterions and hence it constructs wormhole geometry in the bulge of the MWG. Further, the DM candidate around bulge is suitable to harbor wormhole by violating the null energy condition(NEC) corresponding to three different redshift functions. The striking point of our solution is that for zero Global Monopole Charge the wormholes are asymptotically flat corresponding to the first two choices of redshift functions while for positive values of Global Monopole Charge wormhole becomes non asymptotically flat and Global Monopole Charge also has the crucial effect on the violation of NEC. In our solutions, one can note that the total amount of averaged NEC violating matter in the wormhole spacetime depends on the Global Monopole Charge 
. Furthermore, the respective wormhole solutions are in equilibrium positions.
© The Author(s) 2020
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