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Incoming links: Age-metallicity degeneracy
Past exam of the mathematics course of the University of Cambridge 2010 iii Paper 60 4 iii Solution Created 2026-10-03 Updated 2026-10-14
Metal absorption lines depend on the temperatures, ionization states and luminosity weights of the contributing stellar populations, as well as their stellar metallicity. A young stellar population dominated by hot luminous stars can have weak metal absorption lines even at substantial abundance, so weak lines alone do not establish low metallicity, an aspect of the age-metallicity degeneracy.