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Scalarized non-topological neutron stars in multi-scalar Gauss–Bonnet gravity
- Source :
- European Physical Journal C: Particles and Fields, Vol 82, Iss 2, Pp 1-7 (2022)
- Publication Year :
- 2022
- Publisher :
- SpringerOpen, 2022.
-
Abstract
- Abstract 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 $$\varphi :spacetime \rightarrow target\ space$$ φ : s p a c e t i m e → t a r g e t s p a c e . 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.
Details
- Language :
- English
- ISSN :
- 14346044 and 14346052
- Volume :
- 82
- Issue :
- 2
- Database :
- Directory of Open Access Journals
- Journal :
- European Physical Journal C: Particles and Fields
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6b9dd716b4a64310a06d01968705c761
- Document Type :
- article
- Full Text :
- https://doi.org/10.1140/epjc/s10052-022-10046-0