We present spatially resolved kinematics and global stellar populations and mass-to-light ratios for a sample of 39 dwarf early-type ( dE ) galaxies in the Virgo cluster studied as part of the SMAKCED stellar absorption-line spectroscopy and imaging survey .
This sample is representative of the early-type population in the absolute magnitude range -19.0 < M _ { r } < -16.0 .
For each dE , we measure the rotation curve and velocity dispersion profile and fit an analytic function to the rotation curve .
We study the significance of the departure of the rotation curve from the best fit analytic function ( poorly fit ) and of the difference between the approaching and receding sides of the rotation curve ( asymmetry ) .
We find that 62 \pm 8 ~ { } \% ( 23 out of the 39 ) of the dEs have a significant anomaly in their rotation curve .
Analysis of the images reveals photometric anomalies for most galaxies .
However , there is no clear correlation between the significance of the photometric and kinematic anomalies .
We measure age-sensitive and metallicity-sensitive Lick spectral indices and find a wide range of ages and metallicities .
We also find that 4 dEs have emission partially filling in the Balmer absorption lines .
Finally , we estimate the total masses and dark matter fractions of the dEs .
They have a median total mass and dark matter fraction within the R _ { e } of { \log M } _ { e } = 9.1 \pm 0.2 and f _ { DM } = 46 \pm 18 ~ { } \% .
We plot several scaling relations and show that dEs seem to be the bridge between massive early-type and dwarf spheroidal galaxies .