MG14 - Talk detail |
Participant |
Kesavan, Aruna | |||||||
Institution |
The Pennsylvania State University - 104 Davey Lab - University Park - PA - USA | |||||||
Session |
EU3 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Asymptotics with a positive cosmological constant | |||||
Coauthors | ||||||||
Abstract |
The framework that allows the study of isolated systems is well-developed for space-times with a vanishing cosmological constant $Lambda$ and it lies at the foundation of research in diverse areas in gravitational physics. However, observations suggest our universe is best described by $\Lambda > 0$. The standard extension of this framework to space-times with $Lambda > 0$ is physically uninteresting as there is no physically useful notion of fluxes of conserved quantities carried away by gravitational waves. I will illustrate this with linearized gravity. The linear analysis shows that conserved quantities can be constructed using the symplectic formulation which is used to obtain a modified quadrupole formula for gravitational radiation. This analysis provides a first step to estimate the corrections provided by $Lambda > 0$ when studying general relativistic gravitating systems. |
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Pdf file |
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