TY - JOUR
T1 - Gravitational Waves from Isolated Systems
T2 - Surprising Consequences of a Positive Cosmological Constant
AU - Ashtekar, Abhay
AU - Bonga, Béatrice
AU - Kesavan, Aruna
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - There is a deep tension between the well-developed theory of gravitational waves from isolated systems and the presence of a positive cosmological constant Λ, however tiny. In particular a generalization of Einstein's 1918 quadrupole formula that would allow a positive Λ is not yet available. We first explain the principal difficulties and then show that it is possible to overcome them in the weak field limit. These results also provide concrete hints for constructing the Λ>0 generalization of the Bondi-Sachs framework for full, nonlinear general relativity.
AB - There is a deep tension between the well-developed theory of gravitational waves from isolated systems and the presence of a positive cosmological constant Λ, however tiny. In particular a generalization of Einstein's 1918 quadrupole formula that would allow a positive Λ is not yet available. We first explain the principal difficulties and then show that it is possible to overcome them in the weak field limit. These results also provide concrete hints for constructing the Λ>0 generalization of the Bondi-Sachs framework for full, nonlinear general relativity.
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U2 - 10.1103/PhysRevLett.116.051101
DO - 10.1103/PhysRevLett.116.051101
M3 - Article
C2 - 26894695
AN - SCOPUS:84957812959
SN - 0031-9007
VL - 116
JO - Physical review letters
JF - Physical review letters
IS - 5
M1 - 051101
ER -