07.08.2013 Views

An Introduction to Supernovae - LUTH

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•<br />

Gravitational radiation<br />

- ripples in the fabric of spacetime (relative <strong>to</strong> smooth background)<br />

- far from strong gravitational fields (weak gravitation)<br />

g = + h |h | ≪ 1<br />

Minkowski metric + small perturbation<br />

- plug in<strong>to</strong> Einstein field equations --> wave equation<br />

T T<br />

• □h jk<br />

= 0 ( hT T<br />

jk is analogue of vec<strong>to</strong>r potential A i<br />

in electrodynamics )

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