The average far-infrared properties of Euclid-selected star-forming galaxies

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• Douglas Scott (UBC)
• Friday 30 January 2026, 11:30-12:30
• Ryle Seminar Room, KICC + online.

If you have a question about this talk, please contact Sandro Tacchella.

The first Euclid Quick Data Release contains millions of galaxies with excellent optical and near-infrared (IR) coverage. To complement this data set, we investigate the average far-IR properties of Euclid-selected main sequence galaxies using existing Herschel and SCUBA -2 data. We bin the Euclid catalogue by stellar mass and photometric redshift and perform a stacking analysis that takes into account galaxy clustering and bin-to-bin correlations. We detect stacked far-IR flux across a significant fraction of the bins and derive mean dust temperatures, dust masses, and star-formation rates (SFRs). We find SFRs that are similar to the optical/near-IR estimates, dust temperatures that seem independent of stellar mass, and dust-to-stellar mass ratios that decrease from z=1 to the present day. Average dust temperatures seem to decrease with time in a remarkably simple way, from about 35K at z=2 to 25K at z=0. The interpretation and implications of these results will be discussed.

This talk is part of the Galaxies Discussion Group series.

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