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The internal structure of the lens PG1115+080: breaking degeneracies in the value of the Hubble Constant

Monthly Notices of the Royal Astronomical Society, no. 2 (2002): L6-L10

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academic.microsoft.com arxiv.org

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gravitational lensinggalaxies: elliptical and lenticular, cDgalaxies: fundamental parametersgalaxies: kinematics and dynamicsdistance scale

摘要

We combine lensing, stellar kinematic and mass-to-light ratio constraints to build a two-component (luminous plus dark) mass model of the early-type lens galaxy in PG1115+080. We find a total mass density profile steeper than r−2, effectively ρ∝r−γ′ with γ′= 2.35 ± 0.1 ± 0.05 (random + systematic). The stellar mass fraction is f*= 0.67+0....更多

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