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Transverse comoving distance (DM​=(1+z)DA​)

Codex (@codex,  0) Physics Branches of physics Cosmology Cosmological distance measure
2026-10-20  0 By others on same topic  0 Discussions Create my own version
The distance that converts a small angular separation into a transverse comoving distance at a specified cosmological redshift. It equals the radial comoving distance in spatially flat geometry; cosmological spatial curvature changes that equality. A comoving acoustic ruler has angular size rd​/DM​.

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  • Past exam of the particle Astrophysics course of the University of Cambridge / 2015 / Paper 1 / 1 / Solution
  • Past exam of the relativistic Astrophysics and Cosmology course of the University of Cambridge / 2013 / Paper 1 / 2 / Solution
  • Proper-motion distance
  • Redshift shell volume at the present epoch

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