AdvancedIOAA style, adapted
When does the Hubble flow win?
Galaxies have random peculiar velocities of about km/s. Using km s Mpc, estimate the distance error from Hubble's law for a galaxy at Mpc, and the minimum distance at which this error drops below .
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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.
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