The Local Star Formation Rate Surface Density And Metallicity Relation
  For Star-forming Galaxies
  We study the relations between gas-phase metallicity ($Z$), local stellar
mass surface density ($\Sigma_*$), and the local star formation surface density
($\Sigma_{\rm SFR}$) in a sample of 1120 star-forming galaxies from the MaNGA
survey. At fixed $\Sigma_{*}$ the local metallicity increases as decreasing of
$\Sigma_{\rm SFR}$ or vice versa for metallicity calibrators of N2 and O3N2.
Alternatively, at fixed $\Sigma_{\rm SFR}$ metallicity increases as increasing
of $\Sigma_{*}$, but at high mass region, the trend is flatter. However, the
dependence of metallicity on $\Sigma_{\rm SFR}$ is nearly disappeared for N2O2
and N2S2 calibrators. We investigate the local metallicity against $\Sigma_{\rm
SFR}$ with different metallicity calibrators, and find negative/positive
correlations depending on the choice of the calibrator. We demonstrate that the
O32 ratio (or ionization parameter) is probably dependent on star formation
rate at fixed local stellar mass surface density. Additional, the shape of
$\Sigma_*$ -- $Z$ -- $\Sigma_{\rm SFR}$ (FMR) depends on metallicity calibrator
and stellar mass range. Since the large discrepancy between the empirical
fitting-based (N2, O3N2) to electronic temperature metallicity and the
photoionization model-dependent (N2O2, N2S2) metallicity calibrations, we
conclude that the selection of metallicity calibration affects the existence of
FMR on $\Sigma_{\rm SFR}$.
