Metal-poor stars observed with the automated planet finder telescope. III. CEMP-no stars are the descendant of population III stars


Almusleh N. A. , Taani A., Ozdemir S., Rah M., Al-Wardat M. A. , Zhao G., ...More

ASTRONOMISCHE NACHRICHTEN, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2021
  • Doi Number: 10.1002/asna.202113867
  • Title of Journal : ASTRONOMISCHE NACHRICHTEN

Abstract

This study reports a probabilistic insight into the stellar-mass and supernovae (SNe) explosion energy of five CEMP-no stars' possible progenitors. As such, a direct comparison between the abundance ratios [X/Fe] of the light-elements and the predicted nucleosynthetic yields of SN of high-mass metal-free stars has been performed. This comparison suggests that the possible progenitors have a stellar-mass range of 11 - 22 M-circle dot and explosion energies of 0.3 - 1.8 x 10(51) erg. In addition, we investigate the kinematic signatures, derived from Gaia DR2, to conclude that these five CEMP-no stars have halo-like kinematic and do not enter the outer-halo region. In addition, we link the abundance patterns with kinematic signatures to investigate the Gaia-Sausage and Gaia-Sequoia memberships. This chemo-dynamical analysis suggests that these CEMP-no stars are neither Gaia-Sausage nor Gaia-Sequoia remnant stars, but another accretion event might be responsible for the contribution of these stars to the Galactic Halo.