22,637 research outputs found
All spherically symmetric charged anisotropic solutions for compact star
In the present paper we develop an algorithm for all spherically symmetric
anisotropic charged fluid distribution. Considering a new source function
we find out a set of solutions which is physically well behaved and
represent compact stellar models. A detailed study specifically shows that the
models actually correspond to strange stars in terms of their mass and radius.
In this connection we investigate about several physical properties like energy
conditions, stability, mass-radius ratio, electric charge content, anisotropic
nature and surface redshift through graphical plots and mathematical
calculations. All the features from these studies are in excellent agreement
with the already available evidences in theory as well as observations.Comment: 28 pages, 15 figures, major changes in the text. arXiv admin note:
text overlap with arXiv:1408.5126 by other author
Anisotropic models for compact stars
In the present paper we obtain an anisotropic analogue of Durgapal-Fuloria
(1985) perfect fluid solution. The methodology consists of contraction of
anisotropic factor by the help of both metric potentials and
. Here we consider same as Durgapal-Fuloria (1985)
whereas is that given by Lake (2003). The field equations are solved
by the change of dependent variable method. The solutions set mathematically
thus obtained are compared with the physical properties of some of the compact
stars, strange star as well as white dwarf. It is observed that all the
expected physical features are available related to stellar fluid distribution
which clearly indicate validity of the model.Comment: 18 pages, 13 figures, 4 tables; Published in European Physical
Journal
Normal loads program for aerodynamic lifting surface theory
A description of and users manual are presented for a U.S.A. FORTRAN 4 computer program which evaluates spanwise and chordwise loading distributions, lift coefficient, pitching moment coefficient, and other stability derivatives for thin wings in linearized, steady, subsonic flow. The program is based on a kernel function method lifting surface theory and is applicable to a large class of planforms including asymmetrical ones and ones with mixed straight and curved edges
Generalized model for anisotropic compact stars
In the present investigation an exact generalized model for anisotropic
compact stars of embedding class one is sought for under general relativistic
background. The generic solutions are verified by exploring different physical
aspects, viz. energy conditions, mass-radius relation, stability of the models,
in connection to their validity. It is observed that the model present here for
compact stars is compatible with all these physical tests and thus physically
acceptable as far as the compact star candidates ,
and are concerned.Comment: 19 pages, 12 figures, 3 table
Plotting program for aerodynamic lifting surface theory
A description of and users manual for a USA FORTRAN IV computer program which plots the planform and control points of a wing are presented. The program also plots some of the configuration data such as the aspect ratio. The planform data is stored on a disc file which is created by a geometry program. This program, the geometry program, and several other programs are used together in the analysis of lifting, thin wings in steady, subsonic flow according to a kernel function lifting surface theory
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