منابع مشابه
The Cosmic Horizon
The cosmological principle, promoting the view that the universe is homogeneous and isotropic, is embodied within the mathematical structure of the Robertson-Walker (RW) metric. The equations derived from an application of this metric to the Einstein Field Equations describe the expansion of the universe in terms of comoving coordinates, from which physical distances may be derived using a time...
متن کاملHorizon wave-function and the quantum cosmic censorship
Article history: Received 13 March 2015 Received in revised form 13 April 2015 Accepted 19 May 2015 Available online 22 May 2015 Editor: B. Grinstein We investigate the Cosmic Censorship Conjecture by means of the horizon wave-function (HWF) formalism. We consider a charged massive particle whose quantum mechanical state is represented by a spherically symmetric Gaussian wave-function, and rest...
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Based on dramatic observations of the cosmic microwave background radiation with WMAP and of Type Ia supernovae with the Hubble Space Telescope and ground-based facilities, it is now generally believed that the Universe’s expansion is accelerating. Within the context of standard cosmology, this type of evolution leads to the supposition that the Universe must contain a third ‘dark’ component of...
متن کاملhorizon of understanding in the mirror of understanding of horizon
gadamer considers understanding as an event which is the result of the fusion of horizon of interpreter and horizon of the text. from his point of view, understanding has a fundamental connection with the concept of horizon and in fact horizon is the central point in the process of understanding. horizon for nietzsche is a limiting concept which is not able to be transitive. husserl draws his a...
متن کاملIsolated Horizon , Killing Horizon and Event Horizon
We consider space-times which in addition to admitting an isolated horizon also admit Killing horizons with or without an event horizon. We show that an isolated horizon is a Killing horizon provided either (1) it admits a stationary neighbourhood or (2) it admits a neighbourhood with two independent, commuting Killing vectors. A Killing horizon is always an isolated horizon. For the case when ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.12499.x