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|Type:||Artigo de periódico|
|Title:||Does Thermodynamics Require Our Cosmos To Undergo A Series Of Contraction/expansion Cycles?|
Tonin Zanchin V.
|Abstract:||A unified geometrical approach to strong and gravitational interactions has been recently proposed, based on the classical methods of General Relativity. According to it, hadrons can be regarded as "black-hole type" solutions of new field equations describing two tensorial metric-fields (the ordinary gravitational field, and the "strong" one). In this paper, we first seize the opportunity for an improved exposition of some elements of the theory relevant to our present scope. Secondly, by extending the Bekenstein-Hawking thermodynamics to the abovementioned "strong black-holes" (SBH), we show: (i) that SBH thermodynamics seems to require a new expansion of our cosmos after its Big Crunch (i.e., that a recontraction of our cosmos has to be followed by a new "creation"); (ii) that a collapsing star with mass M approximately in the range 3 to 5 solar masses, once reached the neutron-star density, could re-explode tending to form a (radiating) object with a diameter of the order of 1 light-day: thus failing to create a gavitational black-hole. © 1986.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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