On the collision of impulsive gravitational waves when coupled with null dust

Details On the collision of impulsive gravitational waves when coupled with null dust On the collision of impulsive gravitational waves when coupled with null dust

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986rspsa.403..189c&link_type=abstract

Royal Society (London), Proceedings, Series A - Mathematical and Physical Sciences (ISSN 0080-4630), vol. 403, no. 1825, Feb. 8,

Mathematics

24

Cosmic Dust, Gravitational Waves, Ideal Fluids, Pulsed Radiation, Space-Time Functions, Wave Scattering, Gauge Theory, Null Zones, Singularity (Mathematics)

Scientific paper

The problem of colliding impulsive gravitational waves is considered when the region of space-time, after the instant of collision, is filled with a mixture of null dusts moving in opposite directions. The extension of the resulting space-time, to regions before the instant of collision, shows that null dust follows the leading edges of the impulsive waves, and, further, that one can arrange that the space-time in these regions is identical with what prevails when a perfect fluid with epsilon = p fills the region after the instant of collision. This ambiguity in the space-time, after the instant of collision, must be traced to an inherent ambiguity in the nature of null dust and its relation with a perfect fluid with epsilon = p.

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