317 citations · 1.3k across the 22 of their papers we have counts for
3 papers · 1 filter
Cosmic String Loop Collapse in Full General Relativity
Thomas Helfer, Josu C. Aurrekoetxea, Eugene A. Lim
We present the first fully general relativistic dynamical simulations of Abelian Higgs cosmic strings using 3+1D numerical relativity. Focusing on cosmic string loops, we show that…
Formation of Relativistic Axion Stars
James Y. Widdicombe, Thomas Helfer, David J. E. Marsh +1
Axions and axion-like particles are compelling candidates for the missing dark matter of the universe. As they undergo gravitational collapse, they can form compact objects such as…
Gravitational Wave Emission from Collisions of Compact Scalar Solitons
Thomas Helfer, Eugene A. Lim, Marcos A. G. Garcia +1
We numerically investigate the gravitational waves generated by the head-on collision of equal-mass, self-gravitating, real scalar field solitons (oscillatons) as a function of the…