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What is the spacetime of {\em physically realizable} spherical collapse?

Sanjay M. Wagh·Ravindra V. Saraykar·Keshlan S. Govinder
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Abstract

We argue that a particular spacetime, a spherically symmetric spacetime with hyper-surface orthogonal, radial, homothetic Killing vector, is a physically meaningful spacetime that describes the problem of spherical gravitational collapse in its full "physical" generality.

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Sanjay M. Wagh, Ravindra V. Saraykar, Keshlan S. Govinder. 2002-08-31. What is the spacetime of {\em physically realizable} spherical collapse?. https://arxiv.org/abs/gr-qc/0209001

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