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Metallicity
Metallicity is generally the proportion of all elements heavier than He in an astronomical context. These have (mainly) been synthsised in stars since the Big Bang. Much work has been done on how the star formation rate enhances metallicity. ISO and XMM are good for measuring the metallicity of SFR. However very little
on how metallicity affects star formation, e.g. the IMF or the nature/fate of potential protoplanetary discs. There are some
indications that IMF tends more towards low-mass with time (and hence probably higher metallicity)
Chabrier 2003 PASP 115 763;
Kroupa 2001 MNRAS 322 231
No obvious application to this demo to produce results but note as a
future possible science question?
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