SDSS-IV MaNGA: Spatially Resolved Star Formation Main Sequence and LI(N) ER Sequence

We present our study on the spatially resolved H alpha and M-* relation for 536 star-forming and 424 quiescent galaxies taken from the MaNGA survey. We show that the star formation rate surface density (Sigma(SFR)), derived based on the Ha. emissions, is strongly correlated with the M-* surface density (Sigma(*)) on kiloparsec scales for star-forming galaxies and can be directly connected to the global star-forming sequence. This suggests that the global main sequence may be a consequence of a more fundamental relation on small scales. On the other hand, our result suggests that similar to 20% of quiescent galaxies in our sample still have star formation activities in the outer region with lower specific star formation rate (SSFR) than typical star-forming galaxies. Meanwhile, we also find a tight correlation between Sigma(H alpha) and Sigma(*) for LI(N)ER regions, named the resolved LI(N)ER sequence, in quiescent galaxies, which is consistent with the scenario that LI(N)ER emissions are primarily powered by the hot, evolved stars as suggested in the literature.