Lens Model Degeneracy and Cosmological Tests by Strong Gravitational Lensing | Zendy

Takeshi Chiba | Zendy; Ryuichi Takahashi | Zendy

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Lens Model Degeneracy and Cosmological Tests by Strong Gravitational Lensing

Author(s) -

Takeshi Chiba,

Ryuichi Takahashi

Publication year - 2002

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.107.625

Subject(s) - physics , degeneracy (biology) , observable , astrophysics , strong gravitational lensing , gravitational lens , dark energy , lens (geology) , weak gravitational lensing , gravitation , cosmology , classical mechanics , galaxy , quantum mechanics , optics , redshift , bioinformatics , biology

We estimate the sensitivity of lensing observables to the parameters in thelens model (isothermal sphere/Navarro-Frenk-White profile) parameters and tocosmological parameters. We find that the observables are primarily dependenton the lens model parameters, while the dependence on cosmological parametersis minor (especially so for the dark energy parameters). We demonstrate thelens model degeneracy by deriving both the projected mass density profile andthe circular velocity profile. We also identify a possible source of theproblem of fitting the averaged mass profile of CL 0024+1654 with theNavarro-Frenk-White profile.Comment: 7 page

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