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8 papers
Exact General Relativistic Rotating Disks Immersed in Rotating Dust Generated from van Stockum Solutions
D. Vogt, P. S. Letelier
A class of exact general relativistic rotating thick disks surrounded by rotating dust is constructed by applying the ``displace, cut, fill and reflect'' method on the van Stockum…
Comments on "Perspectives on Galactic Dynamics via General Relativity"
D. Vogt, P. S. Letelier
In this comment we question some arguments presented in astro-ph/0512048 to refuse the presence of an singular mass surface layer. In particular, incorrect expressions are used for…
Presence of exotic matter in the Cooperstock and Tieu galaxy model
D. Vogt, P. S. Letelier
We analyze the presence of an additional singular thin disk in the recent General Relativistic model of galactic gravitational field proposed by Cooperstock and Tieu. The physical…
Relativistic Models of Galaxies
D. Vogt, P. S. Letelier
A special form of the isotropic metric in cylindrical coordinates is used to construct what may be interpreted as the General Relativistic versions of some wellknown potential-dens…
New Models of General Relativistic Static Thick Disks
D. Vogt, P. S. Letelier
New families of exact general relativistic thick disks are constructed using the ``displace, cut, fill and reflect'' method. A class of functions used to ``fill'' the disks is deri…
A General Relativistic Model for the Gravitational Field of Active Galactic Nuclei Surrounded by a Disk
D. Vogt, P. S. Letelier
An exact but simple general relativistic model for the gravitational field of active galactic nuclei is constructed, based on the superposition in Weyl coordinates of a black hole,…