Linearly expanding universes in JBD-theory |
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| Authors: | P Chauvet O Obregon |
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| Institution: | (1) Departamento de Física, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Mexico, D.F., Mexico |
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| Abstract: | The assumption of a linearly expanding universe for the JBD-cosmological equations generates a set of solutions for the barotropic equations of statep=  (=const.). These solutions turn out to be valid for closed space-except in the casep= which is for open space. The  gravitational constant which is inversely proportional to the scalar field  increases with time if >–1/3 and decreases for <–1/3. No solution exists for =1/3. The Brans-Dicke parameter  is negative if <–1/3. |
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