Feasibility of Probing Dark Energy with Strong Gravitational Lensing Systems. Fisher-Matrix Approach.

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  • Yamamoto Kazuhiro
    Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
  • Kadoya Yasufumi
    Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
  • Murata Tsukasa
    Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
  • Futamase Toshifumi
    Astronomical Institute, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

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  • --- <i>Fisher-Matrix Approach</i> ---

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We assess the feasibility of probing dark energy with strong gravitational lensing systems. The capability of the method, which depends on the accuracy with which the lensing systems are modeled, is quantitatively investigated using the Fisher-matrix formalism. We show that this method might place useful constraints on the density parameter and the redshift evolution of the dark energy by combining it with a constraint from supernova measurements. For this purpose, the lens potential needs to be precisely reconstructed. We determine the required quality of data. We also briefly discuss the optimal strategy to constrain the cosmological parameters using gravitational lensing systems.

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