Abstract
We have studied the effects of an hypothetical initial generation made only of very massive stars (M > 100M ⊙, pair-creation SNe) on the chemical and photometric evolution of spheroidal systems. We found that the effects of Population III stars on the chemical enrichment is negligible if only one or two generations of such stars occurred, whereas they produce quite different results from the standard models if they continuously formed for a period not shorter than 0.1 Gyr. In this case, the results produced are at variance with the main observational constraints of ellipticals such as the average [< α/Fe >✲] ratio in stars and the color-magnitude diagram.
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Pipino, A., Matteucci, F. (2006). The Effects of Pop III Stars on the Abundances of Spheroids. In: Randich, S., Pasquini, L. (eds) Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites. ESO ASTROPHYSICS SYMPOSIA. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-34136-9_116
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DOI: https://doi.org/10.1007/978-3-540-34136-9_116
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