Evolution of the Stellar Initial Mass Function over the Past 10 Gyr

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• Vadim Rusakov
• Wednesday 18 October 2023, 13:40-14:05
• The Hoyle Lecture Theatre + Zoom .

If you have a question about this talk, please contact Hannah Uebler.

This work derives physical properties for ∼10^{5 most well-measured galaxies from 1 deg}2 in the COSMOS field. Their spectral energy distributions are modelled assuming a stellar initial mass function (IMF) that depends on the temperature of the gas in star-forming regions. It is found that galaxies exhibit a continuum of IMF shapes, most of which are bottom-lighter than measured in the Milky Way. The change is strongest in star-bursting galaxies and towards high redshift. Furthermore, correlations of the IMF shape with physical properties and morphologies provide an evolutionary interpretation with hints of distinct modes of star formation in galaxies.

This talk is part of the Institute of Astronomy Seminars series.

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