Two-component dust in spherically symmetric motion
نویسندگان
چکیده
منابع مشابه
Two–Component Dust in Spherically Symmetric Motion
Two components of spherically symmetric, inhomogeneous dust penetrating each other are introduced as a generalization of the well–known Tolman–Bondi dust solution. The field equations of this model are formulated and general properties are discussed. Special solutions with additional symmetries — an extra Killing– or homothetic vector — and their matching to the corresponding Tolman–Bondi solut...
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Null dust is a model for the incoherent superposition of waves with random polarizations and phases, moving in a single direction with the speed of light. It also describes the high frequency (geometrical optics) approximation for any type (including gravitational) radiation. Null dust is characterized by the energy-momentum tensor T ab = ρll. Neither the energy density ρ nor the null vector l ...
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In spherically symmetric charged dust, just like in neutral dust, two kinds of singularity may be present: the Big Bang/Crunch (BB/BC) singularity, and shell crossings. Quite unlike in neutral dust, the BB/BC singularity may be avoided. When the charge density ρe and the mass-energy density ǫ obey |ρe| < De def = √ Gǫ/c2, the conditions that allow the model to avoid the BB/BC singularity necess...
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In spherically symmetric charged dust, just like in neutral dust, two kinds of singularity may be present: the Big Bang/Crunch (BB/BC) singularity, and shell crossings. Quite unlike in neutral dust, the BB/BC singularity may be avoided. When the charge density ρe and the mass-energy density ǫ obey |ρe| < De def = √ Gǫ/c2, the conditions that allow the model to avoid the BB/BC singularity necess...
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We classify all spherically symmetric dust solutions of Einstein’s equations which are self-similar in the sense that all dimensionless variables depend only upon z ≡ r/t. We show that the equations can be reduced to a special case of the general perfect fluid models with equation of state p = αμ. The most general dust solution can be written down explicitly and is described by two parameters. ...
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 1997
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/14/8/020