2010A&A...518L..87S

We present Herschel observations of the isolated, low-mass star-forming Bok globule CB244. It contains two cold sources, a low-mass Class 0 protostar and a starless core, which is likely to be prestellar in nature, separated by 90'' (∼18000AU). The Herschel data sample the peak of the Planck spectrum for these sources, and are therefore ideal for dust-temperature and column density modeling. With these data and a near-IR extinction map, the MIPS 70µm mosaic, the SCUBA 850 µm map, and the IRAM 1.3mm map, we model the dust-temperature and column density of CB244 and present the first measured dust-temperature map of an entire star-forming molecular cloud. We find that the column-averaged dust-temperature near the protostar is ∼17.7K, while for the starless core it is ∼10.6K, and that the effect of external heating causes the cloud dust-temperature to rise to ∼17K where the hydrogen column density drops below 10²¹cm^–2. The total hydrogen mass of CB244 (assuming a distance of 200pc) is 15±5M_☉. The mass of the protostellar core is 1.6±0.1M_☉ and the mass of the starless core is 5±2M_☉, indicating that ∼45% of the mass in the globule is participating in the star-formation process.