Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pb...reptt..98b&link_type=abstract
Technical Report, PB98-168131; IHES/P/98/06 ; Dept. of d'Astrophysique Relativiste et de Cosmologie
Astronomy and Astrophysics
Astrophysics
Gravitational Fields, Gravitational Waves, Anions, Radiation Effects, Damping, String Theory, Strings, Cosmology, Approximation, Claiming, Correction, Errors, Reactivity
Scientific paper
The authors study the radiation reaction on cosmic strings due to the emission of dilatonic, gravitational and axionic waves. After discussing the renormalization of the string tension induced by time-symmetric self-interactions (thereby correcting errors in the literature concerning the effect of the dilaton field), the authors concentrate on the finite radiation damping force associated with the half-retarded minus half-advanced 'reactive' fields. The authors revisit a recent proposal of using a 'local back reaction approximation' for the reactive fields. The authors find, contrary to previous claims, that this proposal leads to antidamping in the case of the axionic field, and to zero (integrated) damping in the case of the gravitational field. The authors propose to use a suitably modified version of the local dilatonic radiation reaction as a substitute for the exact (non local) gravitational radiation reaction.
Buonanno Alessandra
Damour Thibault
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