Browsing by Author "Frebel, A."

Now showing items 1-5 of 5

    • High resolution spectroscopic follow-up of the most metal-poor candidates from SkyMapper DR1.1 

      Yong, D.; Costa, G. S. Da; Bessell, M. S.; Chiti, A.; Frebel, A.; Gao, X.; Lind, K.; Mackey, A. D.; Marino, A. F.; Murphy, S. J.; Nordlander, T.; Asplund, M.; Casey, A. R.; Kobayashi, C.; Norris, J. E.; Schmidt, B. P. (2021-11-01)
      We present chemical abundances for 21 elements (from Li to Eu) in 150 metal-poor Galactic stars spanning -4.1 < [Fe/H] < -2.1. The targets were selected from the SkyMapper survey and include 90 objects with [Fe/H] ≤ -3 of ...

    • The new record holder for the most iron-poor star: HE 1327−2326, a dwarf or subgiant with [Fe/H] = −5.4 

      Frebel, A.; Aoki, W.; Christlieb, N.; Ando, H.; Asplund, M.; Barklem, P.S.; Beers, T.C.; Eriksson, K.; Fechner, C.; Fujimoto, M.Y.; Honda, S.; Kajino, T.; Minezaki, T.; Nomoto, K.; Norris, J.E.; Ryan, Sean G.; Takada-Hidai, M.; Tsangarides, S.; Yoshii, Y. (2005)
      We describe the discovery of HE 1327−2326, a dwarf or subgiant with [Fe/H] = −5.4. The star was found in a sample of bright metal-poor stars selected from the Hamburg/ESO survey. Its abundance pattern is characterized by ...

    • A new sample of extremely/ultra metal-poor stars 

      Perez, A. E. Garcia; Christlieb, N.; Ryan, Sean G.; Beers, T.C.; Aoki, W.; Asplund, M.; Barklem, P.S.; Bessell, M.S.; Eriksson, K.; Frebel, A.; Gustafsson, B.; Korn, A.J.; Nordstrom, B.; Norris, J.E. (2008-12)
      A sample of 30 very metal-poor stars from the Hamburg-European Southern Observatory (ESO) objective-prism survey have been observed at high spectral resolution at the Very Large Telescope (VLT) using the Ultraviolet and ...

    • Nucleosynthetic signatures of the first stars 

      Frebel, A.; Aoki, W.; Christlieb, N.; Ando, H.; Asplund, M.; Barklem, P.S.; Beers, T.C.; Eriksson, K.; Fechner, C.; Fujimoto, M.Y.; Honda, S.; Kajino, T.; Minezaki, T.; Nomoto, K.; Norris, J.E.; Ryan, Sean G.; Takada-Hidai, M.; Tsangarides, S.; Yoshii, Y. (2005-04)

    • R-Process elements from magnetorotational hypernovae 

      Yong, D.; Kobayashi, C.; Costa, G. S. Da; Bessell, M. S.; Chiti, A.; Frebel, A.; Lind, K.; Mackey, A. D.; Nordlander, T.; Asplund, M.; Casey, A. R.; Marino, A. F.; Murphy, S. J.; Schmidt, B. P. (2021-07-08)
      Neutron-star mergers were recently confirmed as sites of rapid-neutron-capture (r-process) nucleosynthesis 1–3. However, in Galactic chemical evolution models, neutron-star mergers alone cannot reproduce the observed element ...