Arrow of time for a collapsing, radiating sphere
1987; Elsevier BV; Volume: 122; Issue: 6-7 Linguagem: Inglês
10.1016/0375-9601(87)90830-9
ISSN1873-2429
Autores Tópico(s)Advanced Differential Geometry Research
ResumoI consider a collapsing sphere of perfect fluid which conducts heat and radiates energy to infinity. The radiation process provides an arrow of time which is compared with the gravitational arrow associated with the Weyl and Ricci tensors. The two arrows point in opposite senses. This suggests that the present definition of the gravitational arrow is unsatisfactory.
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