Type ii cepheids: evidence for na-o anticorrelation for bl her type stars?

HIGHLIGHTS

• who: V. Kovtyukh and collaborators from the Oxford Press (OUP): Policy P, Oxford Option, , (2), pp2276-22854, CNRS, Universite Diderot, , France have published the research work: Type II Cepheids: evidence for Na-O anticorrelation for BL Her type stars?, in the Journal: (JOURNAL)
• what: This model has been reviewed by Charbonnel , see also Renzini et_al . Globular cluster giants show significantly lower oxygen abundance (in Fig 1, the authors show the mean oxygen abundance for each cluster).
• how: For the metal-poor stars the authors used the pair at 5682 and 5688 Å and the . . .
  

   

  

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