What a difference a quadrupole makes?

Abstract

We consider some implications of the departure from spherical symmetry for static solutions of the vacuum Einstein's equations describing black hole mimickers. In particular, we investigate how the presence of mass quadrupole moment affects the collision energy of test particles. We show that collision processes in the vicinity of such exotic compact sources with non vanishing mass quadrupole moment may be significantly different from those in the vicinity of black holes.

12 pages, 7 figures, published version

References in corpus (11)

• No-hair theorem for Black Holes in Astrophysical Environments
• Black hole mimicker hiding in the shadow: Optical properties of the $\gamma$-metric
• Acceleration of colliding shells around a black hole: Validity of the test particle approximation in the Banados-Silk-West process
• Spinning test particles in the $\gamma$ spacetime
• Naked singularities as particle accelerators
• Note on the effect of a massive accretion disk in the measurements of black hole spins
• Naked Singularities as Particle Accelerators II
• The Israel Theorem: What is Nature Trying to Tell Us?
• Static axisymmetric rings in general relativity: How diverse they are
• The Erez-Rosen metric and the role of the quadrupole on light propagation
• Radiation drag in the field of a non-spherical source