Infrared and Radio observations of a small group of protostellar objects
  in the molecular core, L1251-C
  We present a multi-wavelength observational study of a low-mass star-forming
region, L1251-C, with observational results at wavelengths from the
near-infrared to the millimeter. Spitzer Space Telescope observations confirmed
that IRAS 22343+7501 is a small group of protostellar objects. The extended
emission to east-west direction with its intensity peak at the center of L1251A
has been detected at 350 and 850 micron with the CSO and JCMT telescopes,
tracing dense envelope materials around L1251A. The single-dish data from the
KVN and TRAO telescopes show inconsistencies between the intensity peaks of
several molecular line emission and that of the continuum emission, suggesting
complex distributions of molecular abundances around L1251A. The SMA
interferometer data, however, show intensity peaks of CO 2-1 and 13CO 2-1
located at the position of IRS 1, which is both the brightest source in IRAC
image and the weakest source in the 1.3 mm dust continuum map. IRS 1 is the
strongest candidate for the driving source of the newly detected compact CO 2-1
outflow. Over the whole region (14' by 14') of L125l-C, 3 Class I and 16 Class
II sources have been detected, including three YSOs in L1251A. A comparison
with the average projected distance among 19 YSOs in L1251-C and that among 3
YSOs in L1251A suggests L1251-C is an example of low-mass cluster formation,
where protostellar objects are forming in a small group.
