The Dyer - Roeder relation in a universe with particle production
نویسندگان
چکیده
We have obtained analytical exact solutions of the Dyer-Roeder equation in a cosmological model where creation of particles occurs at the expenses of the gravitational field. We discussed the influences of in-homogeneities in the path of a light beam on the apparent diameter of astrophysical objects and consider both redshift independent as redshift dependent distributions of the inhomogeneities.
منابع مشابه
Averaging Inhomogeneous Universes: Volume, Angle, Line of Sight [astroph/9801122
Cosmologies that match in a volume averaged sense need not generally have the same light propagation behaviors. In particular a universe with inhomogeneity may not demonstrate the Friedmann-Robertson-Walker distance-redshift relation even after volume averaging to FRW spacetime. Even the Dyer-Roeder prescription for incorporating inhomogeneity within a universe equivalent to FRW in an angle ave...
متن کاملVolume , Angle , Line of Sight
Cosmologies that match in a volume averaged sense need not generally have the same light propagation behaviors. In particular a universe with inhomogeneity may not demonstrate the Friedmann-Robertson-Walker distance-redshift relation even after volume averaging to FRW spacetime. Even the Dyer-Roeder prescription for incorporating inhomogeneity within a universe equivalent to FRW in an angle ave...
متن کاملDistance-Redshift Relation in a Realistic Inhomogeneous Universe
We investigate the distance-redshift relation in a realistic inhomogeneous universe where the mass distribution is described by the mass function of Sheth and Tormen. It is found that the derived distance deviates systematically from the standard distance up to 10% depending on the choice of the lowest halo mass in which baryonic matter condensed to form luminous object such as galaxies. Remark...
متن کاملLight propagation and the distance-redshift relation in a realistic inhomogeneous universe.
We investigate the distance-redshift relation in a realistic inhomogeneous universe where the mass distribution is described by the mass function of Sheth and Tormen. It is found that the derived distance deviates systematically from the standard distance up to 10% depending on the choice of the lowest halo mass in which baryonic matter condensed to form luminous object such as galaxies. Remark...
متن کاملAnalytical Modeling of the Weak Lensing of Standard Candles I. Empirical Fitting of Numerical Simulation Results
Weak lensing leads to the non-Gaussian magnification distribution of standard candles at given redshift z, p(μ|z). In this paper, we give accurate and simple empirical fitting formulae of the weak lensing numerical simulation results with the generalized Dyer-Roeder prescription. The smoothness parameter α̃ essentially represents the amount of matter that can cause magnification of a given sourc...
متن کامل