Dissecting the Main Sequence: AGN Activity and Bulge Growth in the Local Universe.

Local galaxiesfrom the Sloan Digital Sky Surveyare used to provide additional support for an evolutionary pathway in which AGN activity is associated with star-formationquenching. Composite, Seyfert 2 and LINER galaxiesaccount for $\sim$60\% of all star-formationin massive galaxies($M_\star > 10^{10.5} M_\odot$). Inclusion of these galaxiesresults in a "turnover" in the $SFR - M_\star$ relation for massive galaxies. Our analysis shows that bulgegrowth has already occurred in the most massive galaxies($M_\star > 10^{10.5}$ $M_\odot$), and bulgescontinue to grow as galaxiesquench and redden, $(g-r)$ = 0.5 $\rightarrow$ 0.75. Significant bulgegrowth is also occurring in low massstarburst galaxies($M_\star < 10^{10.5} M_\odot$) at 0.5 dex above the " main sequence" (MS), where we find an increase in $B/T$ from 0.1 $\rightarrow$ 0.3 and bluer colours, $(g-r) < 0.25$ compared to low-mass galaxieson the MS.