AKARI near-infrared spectroscopy of the extended green object
  G318.05+0.09: Detection of CO fundamental ro-vibrational emission
  We present the results of near-infrared (2.5--5.4um) long-slit spectroscopy
of the extended green object (EGO) G318.05+0.09 with AKARI. Two distinct
sources are found in the slit. The brighter source has strong red continuum
emission with H2O ice, CO2 ice, and CO gas and ice absorption features at 3.0,
4.25um, 4.67um, respectively, while the other greenish object shows peculiar
emission that has double peaks at around 4.5 and 4.7um. The former source is
located close to the ultra compact HII region IRAS 14498-5856 and is identified
as an embedded massive young stellar object. The spectrum of the latter source
can be interpreted by blue-shifted (-3000 ~ -6000km/s) optically-thin emission
of the fundamental ro-vibrational transitions (v=1-0) of CO molecules with
temperatures of 12000--3700K without noticeable H2 and HI emission. We discuss
the nature of this source in terms of outflow associated with the young stellar
object and supernova ejecta associated with a supernova remnant.
