Static spherically symmetric Einstein-æther models II: Integrability and the modified Tolman–Oppenheimer–Volkoff approach
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DOI: 10.1016/j.aop.2019.168002
Abstract: We investigate the existence of analytic solutions for the field equations in the Einstein-aether theory for a static spherically symmetric spacetime and provide a detailed dynamical system analysis of the field equations. In particular, we… read more here.
Keywords: oppenheimer volkoff; static spherically; field equations; tolman oppenheimer ... See more keywords
No static spherically symmetric wormholes in Horndeski theory
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DOI: 10.1103/physrevd.97.124040
Abstract: We consider the Horndeski theory in four-dimensional space-time. We show that this theory does not admit stable, static, spherically symmetric, asymptotically flat, Lorentzian wormholes. read more here.
Keywords: spherically symmetric; symmetric wormholes; wormholes horndeski; static spherically ... See more keywords
Homothetic Ricci collineations of non-static spherically symmetric spacetimes with perfect fluid matter
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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