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| Paper: |
Constraining the IMF with the Cosmic Spectral Energy Distribution |
| Volume: |
440, UP2010: Have Observations Revealed a Variable Upper End of the Initial Mass Function? |
| Page: |
377 |
| Authors: |
Wilkins, S. M. |
| Abstract: |
Using the observed local Cosmic Spectral Energy Distribution (CSED) and
Cosmic Star Formation History (CSFH) we constrain the high-mass slope of
the stellar Initial Mass Function (IMF). We find that, together, the CSED
and CSFH suggest that very steep high-mass slopes: α2>2.45 (c.f.
Salpeter α2=2.35) are strongly disfavoured and that a
slightly-shallower than Salpeter high-mass slope α2=2.2 produces
the greatest correspondence. However, these conclusions are dependent on
the accuracy of population synthesis models and the assumption of the
fiducial ΛCDM cosmology. |
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