Millisecond oscillators in accreting neutron stars and black holes
arXiv:astro-ph/0304345
Abstract
Millisecond variability detected in low-mass X-ray binaries (LMXBs) probably reflects motions of accreting fluid in the strong-field gravity of neutron stars or neutron stars. Parametric resonance between two oscillators with unequal eigenfrequencies provides a natural explanation for the 2:3 frequency ratio observed in some black-hole systems, and probably also in the brightest neutron stars. The two oscillators likely correspond to the meridional and radial epicyclic motions.
12 pages, 10 figures. Presented at the 12th Workshop on General Relativity and Gravitation (12 JGRG), Tokyo, November 25-28, 2002