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We present 2.9-4.1 micron integral field spectroscopy of the L4+L4 browndwarf binary HD 130948BC, obtained with the Arizona Lenslets for ExoplanetSpectroscopy (ALES) mode of the Large Binocular Telescope Interferometer(LBTI). The HD 130948 system is a hierarchical triple system, in which the G2Vprimary is joined by two co-orbiting brown dwarfs. By combining the age of thesystem with the dynamical masses and luminosities of the substellar companions,we can test evolutionary models of cool brown dwarfs and extra-solar giantplanets. Previous near-infrared studies suggest a disagreement between HD130948BC luminosities and those derived from evolutionary models. We obtainedspatially-resolved, low-resolution (R~20) L-band spectra of HD 130948B and C toextend the wavelength coverage into the thermal infrared. Jointly using JHKphotometry and ALES L-band spectra for HD 130948BC, we derive atmosphericparameters that are consistent with parameters derived from evolutionarymodels. We leverage the consistency of these atmospheric quantities to favor ayounger age (0.50 \pm 0.07 Gyr) of the system compared to the older age (0.79\pm 0.22 Gyr) determined with gyrochronology in order to address the luminositydiscrepancy.

High Spatial Resolution Thermal-Infrared Spectroscopy with ALES: Resolved Spectra of the Benchmark Brown Dwarf Binary HD 130948BC