AdvancedIOAA style, adapted
The angular size minimum
In an Einstein de Sitter universe, show that the angular diameter distance has a maximum and find the redshift at which a standard rod appears smallest. Evaluate there for km s Mpc.
Saved in this browser only, no account needed.
Reading resources
Material that covers the physics behind this problem.
- An Introduction to Modern AstrophysicsCarroll & Ostlie
The standard reference for olympiad-level astrophysics. Chapters 1-3 cover the celestial sphere, orbits and the magnitude system.
Textbook - Ohio State Astronomy Lecture NotesOhio State University
Clear university-level notes on stars, galaxies and cosmology with derivations you can follow line by line.
Lecture notes - Cosmology CalculatorEdward L. Wright (UCLA)
Converts redshift into distances, lookback time and scale factors. Use it to sanity-check cosmology answers.
Website