Labeling spherically symmetric spacetimes with the Ricci tensor
Sign Up to like & getrecommendations! Published in 2017 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aa525d
Abstract: We complete the intrinsic characterization of spherically symmetric solutions partially accomplished in a previous paper [Class.Quant.Grav. (2010) 27 205024]. In this approach we consider every compatible algebraic type of the Ricci tensor, and we analyze… read more here.
Keywords: spherically symmetric; labeling spherically; symmetric spacetimes; tensor ... See more keywords
Complete spacelike hypersurfaces on symmetric spacetimes
Sign Up to like & getrecommendations! Published in 2020 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ab6f81
Abstract: A Lorentz manifold is said to be a conformally stationary spacetime if it is endowed with a globally defined conformal timelike vector field K, whereas it is a pp-wave when there is a globally defined… read more here.
Keywords: complete spacelike; symmetric spacetimes; vector field; spacelike hypersurfaces ... See more keywords
Perturbations in higher derivative gravity beyond maximally symmetric spacetimes
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.064022
Abstract: We study (covariant) scalar-vector-tensor (SVT) perturbations of infinite derivative gravity (IDG), at the quadratic level of the action, around conformally-flat, covariantly constant curvature backgrounds which are not maximally symmetric spacetimes (MSS). This extends a previous… read more here.
Keywords: higher derivative; gravity; maximally symmetric; action ... See more keywords
Homothetic Ricci collineations of non-static spherically symmetric spacetimes with perfect fluid matter
Sign Up to like & getrecommendations! Published in 2018 at "Modern Physics Letters A"
DOI: 10.1142/s0217732318501961
Abstract: Non-static spherically symmetric spacetimes with perfect fluid matter are considered and their homothetic Ricci collineations (HRCs) are investigated for degenerate as well as non-degenerate Ricci tensor. The present analysis shows that, for non-degenerate Ricci tensor,… read more here.
Keywords: spherically symmetric; ricci; non static; symmetric spacetimes ... See more keywords
Noether Symmetries and Conservation Laws in Static Cylindrically Symmetric Spacetimes via Rif Tree Approach
Sign Up to like & getrecommendations! Published in 2023 at "Symmetry"
DOI: 10.3390/sym15010184
Abstract: A new approach is adopted to completely classify the Lagrangian associated with the static cylindrically symmetric spacetime metric via Noether symmetries. The determining equations representing Noether symmetries are analyzed using a Maple algorithm that imposes… read more here.
Keywords: static cylindrically; symmetric spacetimes; cylindrically symmetric; approach ... See more keywords