We present Keck/OSIRIS infrared IFU observations of the z = 3.153 sub-DLA DLA2233 + 131 , previously detected in absorption to a background quasar and studied with single slit spectroscopy and PMAS integral field spectroscopy ( IFU ) .
We used the Laser Guide Star Adaptive Optics ( LGSAO ) and OSIRIS IFU to reduce the point-spread function of the background quasar to FWHM \sim 0.15″ and marginally resolve extended , foreground DLA emission .
We detect [ O III ] \lambda 5007 emission with a flux F ^ { [ O III ] \lambda 5007 } = ( 2.4 \pm 0.5 ) \times 10 ^ { -17 } ergs s ^ { -1 } cm ^ { -2 } , as well as unresolved [ O III ] \lambda 4959 and H \beta \lambda 4861 emission .
Using a composite spectrum over the emission region , we measure dynamical mass \sim 3.1 \times 10 ^ { 9 } M _ { \odot } .
We make several estimates of star formation rate using [ O III ] \lambda 5007 and H \beta \lambda 4861 emission , and measure a star formation rate of \sim 7.1 - 13.6 M _ { \odot } yr ^ { -1 } .
We map [ O III ] \lambda 5007 and H \beta \lambda 4861 emission and the corresponding velocity fields to search for signs of kinematic structure .
These maps allow for a more detailed kinematic analysis than previously possible for this galaxy .
While some regions show slightly red and blue-shifted emission indicative of potential edge-on disk rotation , the data are insufficient to support this interpretation .