I'm I right in thinking that a Vaidya metric made by taking the Schwarzchild solution in in going Eddington–Finkelstein coordinates and replacing the mass M with a function M(v) describes an in flux of energy where as going to out going Eddington–Finkelstein coordinates(adsbygoogle = window.adsbygoogle || []).push({});

and replacing M with M(u) describes an out flux of energy.

So if I was modelling the collapse of a black hole I would use M(v) where dM/dv is positive and equal the the flux.

I wanted to model a radiating star I would use M(u) with dM/du negative. But for a radiating black hole I could use M(v) with dM/dv negative i.e. an influx of negative energy?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# In flux of negative energy and black holes

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**