Numerical evolutions of spherical Proca stars

Evolutions of magnetized and rotating neutron stars

Steven L. Liebling, Luis Lehner, David Neilsen, and Carlos Palenzuela Department of Physics, Long Island University–C.W. Post Campus, Brookville, New York 11548, USA Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada N2L 2Y5 Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1 Canadian Institute for Advanced Research, Cosmology & Gravity Program, Toro...

Non - Spherical Stellar Models of Compact Stars

Lensing of Stars by Spherical Gas Clouds

If the Galaxy contains ∼1011M⊙ in cold gas clouds of ∼Jovian mass and ∼AU size, these clouds will act as converging lenses for optical light, magnifying background stars at a detectable rate. The resulting light curves can resemble those due to gravitational lensing by a point mass, raising the possibility that some of the events attributed to gravitational microlensing might in fact be due to ...

The Spherical Relativistic Detonation of Scalaron Stars

Now the hypothesis of existence of scalar fields of a various nature and energy density in the modern Universe is intensively explored. It can explain a nature of the dark (nonbaryon) matter in the Universe and an existence of positive Λ-term [1]. One of component of such field has a cluster nature and organizes in the closed gravitational configurations from galactic scales up to relativistic ...

Extreme-Mass-Ratio-Black-Hole-Binary Evolutions with Numerical Relativity

We perform the first fully nonlinear numerical simulations of black-hole binaries with mass ratios 100:1. Our technique is based on the moving puncture formalism with a new gauge condition and an optimal choice of the mesh refinement. The evolutions start with a small nonspinning black hole just outside the ISCO that orbits twice before plunging. We compute the gravitational radiation, as well ...