2016/12/18 by Culetu, Hristu
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.1612.06009
A null fluid with radial pressure is proposed as the source generating Vaidya spacetime. The fluid is anisotropic with no transversal pressures and p = ρ/3 as its equation of state, where p is the isotropic pressure and ρ is the energy density. The radial energy flux is inward directed when m > 0 and the total energy flow crossing a surface of constant r resembles the Brown-York quasilocal energy. A modified Vaidya metric removes the singularity at the origin and the corresponding QLE is investigated in terms of both r and the mass m(v) of the object.