과제 9. Searches for chemical signatures of the first generation of stars

• 개괄

  • After the Big Bang, the first generation of stars (Population III stars) was born in metal-free gas clouds. The nucleosynthetic products from massive Pop III stars should be imprinted in the second generation of stars (Pop II stars). Thus, if the low-mass Pop II stars are still alive, we are able to understand how the nucleosynthesis occurred in the Pop III stars. Moreover, aided by models of supernova elemental yields, we can provide constraints on the mass range of the Pop III stars. So, in this project, we attempt to search for the nucleosynthetic signatures that the Pop III stars produced.

     

• 질문

  • What are the expected chemical signatures from the Pop III stars?

  • By comparing with supernova elemental yield models, what physical properties can you draw about the Pop III stars?

• 참고 논문

  1. “A chemical signature of first-generation very massive stars” by Aoki et al., 2014, Science, 345, 912

  2. “A single low-energy, iron-poor supernova as the source of metals in the star SMSS J031300.36-670839.3” by Keller et al., 2014, Nature, 506, 463

  3. “The Discovery and Analysis of Very Metal-Poor Stars in the Galaxy” by Beers & Christlieb, 2005, ARA&A, 43, 531