🚀 go-pugleaf

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Here's a naive question regarding units used to signify metallicity ...

Does [Fe/H] = [M/H] = [Z/Z_solar] for scaled solar abundances?
   (where M/H represents the number abundance of all elements more massive than
   Helium relative to Hydrogen and Z represents the elemental abundance of
   metals higher then He, by *mass" (not number)).

e.g., provided scaled solar abundances, does an [M/H] of say +1.0 imply an
      [Fe/H] of +1.0 and a Z of 0.2 (assuming Z_solar is about 0.02)?

I assume the above is true, but would of course break down under say the
conditions of alpha-element overabundance (like in the recent stellar evolution
tracks of VandenBerg & Bergbusch, for example).

Sound reasonable?  Told you it was a naive question ...

Brad

-- 
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  Brad K. Gibson                           INTERNET: gibson@geop.ubc.ca
  Dept. of Geophysics & Astronomy         
  #129-2219 Main Mall                      PHONE: (604)822-6722
  University of British Columbia           FAX:   (604)822-6047
  Vancouver, British Columbia, Canada
  V6T 1Z4
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