مقاله Gravitational lenses in the dark Universe : تی پی بین

خلاصه مقاله

We discuss how different cosmological models of the Universe affect the probability that a background source has multiple images related by an angular distance, i.e., the optical depth of gravitational lensing. We examine some cosmological models for different values of the density parameter Ω _i: (i) the cold dark matter model, (ii) the ΛCDM model, (iii) the Bose-Einstein condensate dark matter model, (iv) the Chaplygin gas model, (v) the viscous fluid cosmological model and (vi) the holographic dark energy model by using the singular isothermal sphere (SIS) model for the halos of dark matter. We note that the dependence of the energy-matter content of the universe profoundly modifies the frequency of multiple quasar images.

نویسندگان

R. C. Freitas [ Centro de Ciências Exatas, Departamento de Física, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514—Campus de Goiabeiras, CEP 29075-910, Vitória, Espírito Santo, Brazil ]

S. V. B. Gonçalves [ Centro de Ciências Exatas, Departamento de Física, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514—Campus de Goiabeiras, CEP 29075-910, Vitória, Espírito Santo, Brazil ]

A. M. Oliveira [ Centro de Ciências Exatas, Departamento de Física, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514—Campus de Goiabeiras, CEP 29075-910, Vitória, Espírito Santo, Brazil ]

کلمات کلیدی

Gravitational lensing Cosmology Dark energy Dark matter

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Astrophysics and Space Science 2013

Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered.The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing.Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.Commonly used title abbreviations: Astrophys Space Sci, Ap SS

حوزه های تحت پوشش : Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Extraterrestrial Physics, Space Sciences Astrobiology