1995PASP..107...49R

Using the Dominion Astrophysical Observatory's 1.8 m telescope and infrared array detector, we have detected a near-infrared extended source embedded in the dark molecular cloud L1251. We measure the mean surface brightnesses in J, H and K to be 16.5, 14.1, and 14.1 magnitudes per square arcsecond, respectively. The central object is associated with the IRAS point source 22343+7501, and is composed of more than one source. Millimetre observations using the James Clerk Maxwell telescope yield integrated fluxes ranging from 0.23 (at 1.3 mm) to 0.71 (at 0.8 mm) Jy. Deep J and K' images taken with the Redeye detector on the Canada-France-Hawaii telescope show the source near the extended nebulosity to be multiple. The nebulosity contains a great deal of chaotic structure, and extends more than 30 arcseconds in J and over 20 arcseconds in K'.

The line-of-sight absorption to IRAS 22343+7501 is estimated to be 32± 5 magnitudes, which is comparable to values found for similar objects.

The spectral energy distribution is characteristic of an embedded source, and the range of fluxes at the different wavelengths imply that a single temperature for the cloud is not valid.

The near-IR, far-IR and mm observations are consistent with the objects in this cloud being just past the protostar stage of evolution.