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Like the majority of spiral galaxies, NGC 6155 exhibits an exponentialsurface brightness profile that steepens significantly at large radii. Usingthe VIRUS-P IFU spectrograph, we have gathered spatially resolved spectra ofthe system. Modifying the GANDALF spectral fitting routine for use on thecomplex stellar populations found in spirals, we find that the average stellarages increase significantly beyond the profile break radius. This result is ingood agreement with recent simulations that predict the outskirts of diskgalaxies are populated through stellar migration. With the ability to binmultiple fibers, we are able to measure stellar population ages down to mu_V~24mag/sq arcsec.

IFU Spectroscopy of the Stellar Disk Truncation Region of NGC 6155