March 5, 2009 Journal article Closed Access

Pasquini, Luca; Smiljanic, R.; Bonifacio, P.; Gratton, R.; Galli, D.; Randich, S.

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{
  "DOI": "10.1017/s1743921308027609", 
  "abstract": "AbstractWe use Beryllium to investigate star formation in the early Galaxy. Be has been demonstrated to be a good indicator of time in these early epochs. By analyzing the so-far largest sample of halo and thick disk metal poor stars, we find a clear scatter in Be for a given value of [Fe/H] and [O/H]. The scatter is very pronounced for Halo stars, while it is marginal for thick disk stars. Our halo stars separate in the [\u03b1/Fe] - Be diagram, showing two main branches: one indistinguishable from the thick disk stars, and one with lower [\u03b1/Fe] ratio. The stars belonging to this branch are characterized by highly eccentric orbits and small perigalactic radius (Rmin). Their kinematics are consistent with an accreted component.", 
  "author": [
    {
      "family": "Pasquini, Luca"
    }, 
    {
      "family": "Smiljanic, R."
    }, 
    {
      "family": "Bonifacio, P."
    }, 
    {
      "family": "Gratton, R."
    }, 
    {
      "family": "Galli, D."
    }, 
    {
      "family": "Randich, S."
    }
  ], 
  "id": "180404", 
  "issued": {
    "date-parts": [
      [
        2009, 
        3, 
        5
      ]
    ]
  }, 
  "language": "eng", 
  "title": "Beryllium and the formation of the Thick Disk and of the Halo", 
  "type": "article-journal"
}