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10 papers · 1 filter
Analytical r-mode solution with gravitational radiation reaction force
Óscar J. C. Dias, Paulo M. Sá
We present and discuss the analytical r-mode solution to the linearized hydrodynamic equations of a slowly rotating, Newtonian, barotropic, non-magnetized, perfect-fluid star in wh…
Vacuum Cherenkov radiation in Maxwell-Chern-Simons electrodynamics
R. Lehnert, R. Potting
We study the Cherenkov effect in the context of the Maxwell-Chern-Simons (MCS) limit of the Standard Model Extension. We present a method to determine the exact radiation rate for…
The role of differential rotation in the evolution of the r-mode instability
Paulo M. Sá, Brigitte Tomé
We discuss the role of differential rotation in the evolution of the l=2 r-mode instability of a newly born, hot, rapidly-rotating neutron star. It is shown that the amplitude of t…
Gravity from Local Lorentz Violation
Alan Kostelecky, Robertus Potting
In general relativity, gravitational waves propagate at the speed of light, and so gravitons are massless. The masslessness can be traced to symmetry under diffeomorphisms. However…
A remark on Rasmussen's invariant of knots
Marco Mackaay, Paul Turner, Pedro Vaz
We show that Rasmussen's invariant of knots, which is derived from Lee's variant of Khovanov homology, is equal to an analogous invariant derived from certain other filtered link h…
Lorentz violation as a quantum-gravity signature
Ralf Lehnert
Many theoretical approaches to quantum gravity predict the breakdown of Lorentz symmetry at Planck energies. Kinematical cosmic-ray studies are a sensitive tool in the search for s…