  We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies
from the MaNGA DR13 sample. By comparing the stellar mass-to-light ratios
estimated from stellar population synthesis (SPS) and from JAM, we find a
similar systematic variation of the initial mass function (IMF) as in the
earlier $\rm ATLAS^{3D}$ results. Early type galaxies (elliptical and
lenticular) with lower velocity dispersions within one effective radius are
consistent with a Chabrier-like IMF while galaxies with higher velocity
dispersions are consistent with a more bottom heavy IMF such as the Salpeter
IMF. Spiral galaxies have similar systematic IMF variations, but with slightly
different slopes and larger scatters, due to the uncertainties caused by higher
gas fractions and extinctions for these galaxies. Furthermore, we examine the
effects of stellar mass-to-light ratio gradients on our JAM modeling, and find
that the trends from our results becomes stronger after considering the
gradients.
