A Vaidya-type generalisation of Kerr space-time

Understand

A new Vaidya-type generalisation of Kerr space-time is constructed by requiring the Kerr mass and angular momentum per unit mass to depend upon a variable which has a simple geometrical origin.

• The matter distribution introduced in this way radiates mass and angular momentum at future null infinity.
• The Vaidya generalisation of the Schwarzschild space-time is a special case of the newly found solution.