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The quadrupole formula: a hundred years later

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If you have a question about this talk, please contact Christopher Moore.

An extraordinary Friday GR seminar outside of usual term dates

Einstein’s celebrated quadrupole formula lies at the foundation of the first indirect evidence for gravitational waves: it explains with high precision the shrinking of the orbital radius of the Hulse-Taylor system. The formula expresses the power radiated in the form of gravitational radiation in terms of the source quadrupole moments. However, the derivation assumes a Minkowski background, but there is strong observational evidence for a positive cosmological constant. To account for this, the quadrupole formula is generalized by replacing the Minkowski background with a de Sitter space-time. In this talk, I will focus on the conceptual subtleties that arise and comment on physical implications.

This talk is part of the DAMTP Friday GR Seminar series.

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