Fate of the Universe, Age of the Universe, Dark Matter, and the Decaying Vacuum Energy
نویسندگان
چکیده
منابع مشابه
Fate of the Universe, Age of the Universe, Dark Matter, and the Decaying Vacuum Energy
It is shown that in cosmological models based on a vacuum energy decaying as a−2, where a is the scale factor of the universe, the fate of the universe in regard to whether it will collapse in the future or expand forever is determined not by the curvature constant k but by an effective curvature constant keff . It is argued that a closed universe with k = 1 may expand forever, in other words s...
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China We consider the possibility of observing the onset of the late time inflation of our patch of the Universe. The Hubble size criterion and the event horizon criterion are applied to several dark energy models to discuss the problem of future inflation of the Universe. We find that the acceleration has not lasted long enough to confirm the onset of inflation by present observations for the ...
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Recent observations confirm that our universe is flat and consists of a dark energy component ΩDE ≃ 0.7. This dark energy is responsible for the cosmic acceleration as well as determines the feature of future evolution of the universe. In this paper, we discuss the dark energy of universe in the framework of scalar-tensor cosmology. It is shown that the dark energy is the main part of the energ...
متن کامل[Dark matter and dark energy of the universe].
At the turn of the 20th Century, the Universe was thought to consist of our solar system, the Sun, planets, satellites and comets, floating under the Milky Way. The astronomers were ignorant of the existence of galaxies, clusters, quasars and black holes. Over the last ten years the Cosmology has made remarkable progress in our understanding of the composition of the Universe: 23 per cent is in...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X,1538-4357
DOI: 10.1086/307418