Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-03-26
Class.Quant.Grav. 20 (2003) 1479-1488
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
11 pages, 3 figures
Scientific paper
In the present work we approximate an ultrarelativistic jet by a homogeneous beam of null matter with finite width. Then, we study the influence of this beam over the space-time metric in the framework of higher-derivative gravity. We find an exact shock wave solution of the quadratic gravity field equations and compare it with the solution to Einstein's gravity. We show that the effect of higher-curvature gravity becomes negligible at large distances from the beam axis. We also observe that only the Ricci-squared term contribute to modify the Einstein's gravity prediction. Furthermore, we note that this higher-curvature term contribute to regularize the discontinuities associated to the solution to Einstein's general relativity.
Aguiar Odylio Denys
de Araujo Jose Carlos N.
Rey Neto Edgard Casal de
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