The gravitational properties of a straight cosmic string are studied in the linear approximation of higher-derivative gravity. These properties are shown to be very different from those found using linearized Einstein ...

The gravitational properties of a straight cosmic string are studied in the linear approximation of higher-derivative gravity. These properties are shown to be very different from those found using linearized Einstein ...

The gravitational properties of a straight cosmic string are studied in the linear approximation of higher-derivative gravity. These properties are shown to be very different from those found using linearized Einstein ...

An exact solution of straight spinning cosmic strings in Brans-Dicke theory of gravitation is presented. The possibility of the existence of closed time-like curves around these cosmic strings is analyzed. Furthermore, the ...

In this work we deal with the spacetime shaped by a straight cosmic string, emerging from local gauge theories, in the braneworld gravity context. We search for physical consequences of string features due to the modified ...

A twisted scalar field conformally coupled to gravitation is used to calculate the vacuum stress-energy tensor in the background spacetime generated by an infinite straight gauge cosmic string. The result found has an ...

A partir da teoria da gravitação de Brans-Dicke, são obtidas soluções exatas para as cordas cósmicas girantes. As soluções são para cordas retas, que preservam a simetria de Lorentz ao longo do eixo longitudinal de simetria, ...

A gravitação quadrática em (2 + 1)D, ao contrário da gravitação tridimensional de Einstein, é localmente não trivial e possui um potencial extremamente bem comportado. Analisa-se esta teoria neste trabalho. Obtém-se a ...