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This work presents and releases a catalog of new photometrically-derivedphysical properties for the $\sim 10^5$ most well-measured galaxies in theCOSMOS field on the sky. Using a recently developed technique, spectral energydistributions are modeled assuming a stellar initial mass function (IMF) thatdepends on the temperature of gas in star-forming regions. The method isapplied to the largest current sample of high-quality panchromatic photometry,the COSMOS2020 catalog, that allows for testing this assumption. It is foundthat the galaxies exhibit a continuum of IMF, and gas temperatures, most ofwhich are bottom-lighter than measured in the Milky Way. As a consequence, thestellar masses and star formation rates of most galaxies here are found to belower than those measured by traditional techniques in the COSMOS2020 catalogby factors of $\sim 1.6-3.5$ and $2.5-70.0$, respectively, with the changebeing the strongest for the most active galaxies. The resulting physicalproperties provide new insights into variation of the IMF-derived gastemperature along the star-forming main sequence and at quiescence, produce asharp and coherent picture of downsizing, as seen from the stellar massfunctions, and hint at a possible high-temperature and high-density stage ofearly galactic evolution.

A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function