Research Note Prediction for the first generation stars from a Galactic halo chemical evolution model with Miller-Scalo initial mass function

Abstract

A model of supernova-driven chemical evolution of the Galactic halo proposed by Tsujimoto et al. ([CITE]) (TSY) is used to investigate the observations of the first generation stars (FGS). We assume in this paper that a star with a metallicity ${\rm [Fe/H]}\le -6$ is truly a FGS. We obtain FGS probabilities with the Miller-Scalo form of the stellar initial mass function and limit our model parameters to values consistent with the observed metallicity distributions of metal-poor stars in the range of $-4.0 7 to $1 10^8 M_\odot$, our model suggests that the probability of identifying FGS in the halo is about 6.14 10 -5 to 6.14 10 -6 .