Introduction to Cosmology Example Exam Question

Lecture 14: Cosmological constant part 2

Plot of omega_lambda vs omega_m
The diagram shows recent determinations of Ωm0 and ΩΛ0. Explain how the X-ray emission from rich clusters of galaxies is used to determine Ωm0. Further explain how it can be used to determine the ratio of baryonic to non-baryonic matter in the cluster. [5]

(2008 Q8(b).)

Go to the hints and suggestions.