TDCOSMO V: strategies for precise and accurate measurements of the Hubble constant with strong lensing

@article{Birrer2020TDCOSMOVS,
  title={TDCOSMO V: strategies for precise and accurate measurements of the Hubble constant with strong lensing},
  author={Simon Birrer and Tommaso Treu},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2020}
}
  • S. Birrer, T. Treu
  • Published 2020
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics
Strong lensing time delays can measure the Hubble constant H$_0$ independent of any other probe. Assuming commonly used forms for the radial mass density profile of the lenses, a 2\% precision has been achieved with 7 Time-Delay Cosmography (TDCOSMO) lenses, in tension with the H$_0$ from the cosmic microwave background. However, without assumptions on the radial mass density profile -- and relying exclusively on stellar kinematics to break the mass-sheet degeneracy -- the precision drops to 8… Expand

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