A Minimum Dilution Scenario for Supernovae and Consequences for Extremely Metal-Poor Stars

Understand

To date no metal-free stars have been identified by direct observations.

• The most common method of constraining their properties is searching the spectra of the most metal-poor stars for the chemical elements created in the first stars and their supernova.
• In this approach, modelled supernova yields are compared to the observed abundance patterns in extremely metal-poor stars.
• The method typically only uses the abundance ratios, i.e., the yields are diluted to the observed level.