Implications of a Temperature-dependent Initial Mass Function. II. An Updated View of the Star-forming Main Sequence

The stellar initial mass function (IMF) is predicted to depend upon the temperature of gas in star-forming molecular clouds. introduction an additional parameter, $T_{IMF}$ , into photometric template fitting, allows galaxies be fit with a range IMFs. Three surprising new features appear: (1) most are best bottom-lighter IMF than Milky Way; (2) at fixed redshift very similar IMF; and (3) massive instead exhibit less bottom-light IMF, that measured quiescent galaxies. Additionally, since masses star formation rates both on these results slightly modify resulting relationship, while yielding qualitative characteristics previous studies.