https://doi.org/10.1140/epjc/s10052-022-10046-0
Regular Article - Theoretical Physics
Scalarized non-topological neutron stars in multi-scalar Gauss–Bonnet gravity
Department of Theoretical Physics, Faculty of Physics, Sofia University, 1164, Sofia, Bulgaria
Received:
30
September
2021
Accepted:
22
January
2022
Published online:
4
February
2022
In the present paper we construct novel non-topological, spontaneously scalarized neutron stars in multi-scalar Gauss–Bonnet gravity with maximally symmetric target space, and nontrivial map 
. The theory is characterized by the fact that for some classes of coupling functions the field equations allow solutions with trivial scalar field, which coincide with the general relativistic ones. For a certain range of parameters those solutions lose stability and new branches of solutions with nontrivial scalar field bifurcate from the trivial branch. For a given set of parameters, those branches are characterized by the number of zeros of the scalar field, and they are energetically more favorable than the general relativistic ones.
© The Author(s) 2022
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