Electromagnetism and hidden vector fields in modified gravity theories: Spontaneous and induced vectorization
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Electromagnetism and hidden vector fields in modified gravity theories : Spontaneous and induced vectorization. / Annulli, Lorenzo; Cardoso, Vitor; Gualtieri, Leonardo.
I: Physical Review D, Bind 99, Nr. 4, 044038, 19.02.2019.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Electromagnetism and hidden vector fields in modified gravity theories
T2 - Spontaneous and induced vectorization
AU - Annulli, Lorenzo
AU - Cardoso, Vitor
AU - Gualtieri, Leonardo
PY - 2019/2/19
Y1 - 2019/2/19
N2 - In general relativity, Maxwell's equations are embedded in curved spacetime through the minimal prescription, but this could change if strong-gravity modifications are present. We show that with a nonminimal coupling between gravity and a massless vector field, nonperturbative effects can arise in compact stars. We find solutions describing stars with nontrivial vector field configurations, some of which are associated with an instability, while others are not. The vector field can be interpreted either as the electromagnetic field or as a hidden vector field weakly coupled with the standard model.
AB - In general relativity, Maxwell's equations are embedded in curved spacetime through the minimal prescription, but this could change if strong-gravity modifications are present. We show that with a nonminimal coupling between gravity and a massless vector field, nonperturbative effects can arise in compact stars. We find solutions describing stars with nontrivial vector field configurations, some of which are associated with an instability, while others are not. The vector field can be interpreted either as the electromagnetic field or as a hidden vector field weakly coupled with the standard model.
U2 - 10.1103/PhysRevD.99.044038
DO - 10.1103/PhysRevD.99.044038
M3 - Journal article
VL - 99
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 4
M1 - 044038
ER -
ID: 298643965