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Methane Dwarf Spectrum
This graph shows the spectrum of the first methane dwarf detected by the SDSS. The object is distinguished by the presence of very strong methane (CH4) absorption bands. Absorption bands of water are also seen in the near infrared.
The region of the spectrum at wavelengths below 1 micron was observed
with the 3.5-meter ARC telescope; the region above about a micron was
observed at the UKIRT 3.8-meter telescope by Sandy Leggett and Tom
Geballe. UKIRT observations by Leggett and Geballe also confirmed the
nature of the second SDSS methane dwarf.
This image is also available as a PostScript file (39 KB).