| Autor: |
Pimentel, Luis O., Diaz-Rivera, Luz M. |
| Předmět: |
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| Zdroj: |
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics; 4/20/99, Vol. 14 Issue 10, p1523, 7p |
| Abstrakt: |
The effect of a time dependent cosmological constant is considered in a family of scalar-tensor theories. Friedmann-Robertson-Walker cosmological models for vacuum and perfect fluid matter are found. They have a linear expansion factor, the so-called coasting cosmology, the gravitational "constant" decreases inversely with time; that is these models satisfy the Dirac Hypotheses. The cosmological "constant" decreases inversely with the square of time, therefore we can have a very small value for it at present time. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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