Morphology & Environment's Role on the Star Formation Rate -- Stellar Mass Relation in COSMOS from 0 < z < 3 5 by Kevin C. Cooke et al. on Wednesday 30 November

We investigate the relationship between environment, morphology, and the star

formation rate -- stellar mass relation derived from a sample of star-forming

galaxies (commonly referred to as the `star formation main sequence') in the

COSMOS field from 0 < z < 3.5. We constructed and fit the FUV--FIR SEDs of our

stellar mass-selected sample of 111,537 galaxies with stellar and dust emission

models using the public packages MAGPHYS and SED3FIT. From the best fit

parameter estimates, we construct the star formation rate -- stellar mass

relation as a function of redshift, local environment, NUVrJ color diagnostics,

and morphology. We find that the shape of the main sequence derived from our

color-color and sSFR-selected star forming galaxy population, including the

turnover at high stellar mass, does not exhibit an environmental dependence at

any redshift from 0 < z < 3.5. We investigate the role of morphology in the

high mass end of the SFMS to determine whether bulge growth is driving the high

mass turnover. We find that star-forming galaxies experience this turnover

independent of bulge-to-total ratio, strengthening the case that the turnover

is due to the disk component's specific star formation rate evolving with

stellar mass rather than bulge growth.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.16527v1