Exact solutions with w modes - art. no. 024005

Citation
M. Ishak et al., Exact solutions with w modes - art. no. 024005, PHYS REV D, 6402(2), 2001, pp. 4005
Citations number
38
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6402
Issue
2
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010715)6402:2<4005:ESWWM->2.0.ZU;2-P
Abstract
An explicit necessary condition for the internal trapping of null geodesics , along with the occurrence of resonance scattering of axial gravitational waves, is proposed for static spherically symmetric perfect fluid solutions of Einstein's equations. Some exact inhomogeneous solutions which exhibit this trapping are given with special attention to boundary conditions and t he physical acceptability of the space-times. In terms of the tenuity (alph a =R/M at the boundary) all the examples given here lie in the narrow range 2.8<<alpha><2.9. The tenuity can be raised to more interesting values by t he addition of an envelope without altering the trapping.