Metal‐poor stars observed with the automated planet finder telescope. III . CEMP ‐no stars are the descendant of population III stars
Makaleler > Tam Makale · 2021
Yazarlar: Nour Aldein Almusleh, Ali Taani, Sergen Özdemir, Maria Rah, Mashhoor A. Al‐Wardat, Gang Zhao, Mohammad K. Mardini
Astronomische Nachrichten, Uluslararası, Wos, 2021, cilt 342, ss 625-632
Özet
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⊙ and explosion energies of 0.3 − 1.8 × 1051 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.