... M dwarf spectral classification . ... In any event, the water bands continue to increase in strength through spectral type L. Figure L2.7: Ultracool dwarfs at near-infrared wavelengths - later spectral types . ... Finally, Figure L2.13 shows both the near-infrared and mid-infrared energy distribution of the prototype T dwarfs, Gl 229B. The strong absorption due to the fundamental band of CH 4 at 3.3 microns is obvious, as is CO absorption near 5 microns. ... M dwarf Spectral classification --- | ...